How to Use Essential Oils in a Diffuser (A Beginner’s Guide and FAQ)

In Aromatherapy, essential oils have many uses and benefits. They seem to have taken over the world of natural remedies. Diffusers can help you enjoy all the benefits of an oil by inhalation. Being new at this, you’re probably wondering how to use essential oils in a diffuser.


For good reason too! To help you get started, I will give you the answers to some frequently asked questions. They will help you with the basic knowledge about diffusing essential oils.


How to use an essential oil diffuser and how exactly do diffusers work? What do essential oils really do when they’re diffused? Why should you even use an essential oil diffuser? etc. All these questions and many others will get an answer in the following chapter.


After establishing the basic knowledge for essential oil diffusers, you can then move on. You’ll find details about types of diffusers to use and details about their benefits. Also, learn how to diffuse essential oils in each type of  diffuser.


It is only natural to also know the precaution measures to take while diffusing Aroma oils. I will talk more about that in the last chapter of the article.


You’ll also see what essential oils are recommended to use for specific needs (e.g.: relaxation, sleeping, etc.)


As soon as you’ll get past this first chapter, you’ll see it’ll all start making sense. That being said, let’s begin.


 Q & A on Why and How to Use Essential Oils in a Diffuser


Essential oils can be used in many different ways. Depending on their situation and needs, people may choose an essence for each. The best part about diffusing essential oils is that you can actually enjoy most of their properties in a high concentration. You can inhale anywhere between 50 – 70% of active molecules.


How to Use essential oils in a diffuser


  • What does essential oils diffusion mean and how does it all work?


Diffusion is a process that uses heat and water. The heat makes water and oil molecules evaporate. During this process, tiny molecules of essential oils are released into the air.


Newer technologies however, found ways of diffusing oil molecules without heat or water. This technology is known as atomizing or nebulizing diffusers.


Those molecules travel through your nasal passage into the brain, lungs and kidneys. Through inhalation, the essential oils molecules go into the bloodstream in a percentage of 50% – 70%.


Inhalation is the second best method to get the oils into the bloodstream. It’s the second after injections. The injection of essential oils, however, is never ever recommended!


  • How do you use a diffuser with essential oils?


Depending on its type, an essential oil diffuser can be used in a few simple ways. They can be heat-based (candle oil burners) or they can use the latest technologies available.


The latter can be ultrasonic diffusers or nebulizers. They’re both different technologies, much superior to the others. You will read more about the diffusion technologies we have available, shortly.


In other words, oil diffusers can be lit or plugged, or simply inhaled from a piece of a cotton pad.


  • Why diffuse essential oils?


Essential oil molecules have the power to destroy germs and bacteria that thrive in the air. They can be diffused into a working or living space because:


  • Essential oils can refresh the air where you live or work.
  • They can inhibit mold growth.
  • Used regularly, Aroma oils can prevent microbial infections or inflammations.
  • They can help strengthen the immune system.
  • They can also remove foul odors like cigarette smoke, molded fruits & vegetables, etc.
  • When you inhale, essential oil molecules reach the brain as well. They can affect your nervous system and improve your mood.
  • They can also improve oxygen to the brain and all the other organs.
  • Essential oils can help you sleep better and relax more often.
  • During the cold season, they can help you breathe easier. They can protect against many respiratory infections.
  • Combine a massage blend with the diffusion of certain essential oils. That way, you’ll get relief from muscular pain, migraines or sore joints.
  • Essential oils can help you focus better during exams or important projects. Diffuse Rosemary essential oil or citrus oils for that purpose.
  • Aromatic oils can also help repel bugs, mosquitoes, moths and ants. Diffuse Lavender to keep them away from your home.
  • How many drops of essential oil to put in a diffuser?


The amount of oil drops you use should depend on the oil you use, the room and the purpose. Since aromatic oils can oxidize quite fast, the best way to enjoy their full potential is to add them fresh each time.


I recommend changing the water and cleaning the diffuser’s recipient every couple of days. Mold is known to start growing within 24 – 48 hours.


Aromatic oils are very concentrated, thus their smell and effects can be pretty powerful. Lighter oils like citrus, Pine, Lavender, etc. can be used at a ratio of 5 – 15 drops. If the room is very large, the amount of oil drops should increase too.


Large rooms are great to diffuse oils in because you ca experiment with as many drops of essential oil as you want to put in your diffuser.


If the purpose is to simply relax and unwind, then a lower amount will do the job. Just make sure you keep your room well ventilated while diffusing essential oils.


Too much oil can saturate the air and cause headaches, nausea and overall, aggravate your state.


To prevent viral infections or soothe respiratory problems, it’s best to diffuse a moderate amount of oils. Also, heavier essences should be mixed with lighter ones for diffusion.


For example, mix Sandalwood or Frankincense with Orange. Or Cinnamon with Grapefruit, Pine, etc.


  • How often can you diffuse your favorite essential oils?


You can do it several times a day, as long as you keep in mind a few things. Like I said, these concentrated essences are very powerful.


They can saturate the air and their aroma may cause headaches or nausea. That’s why the room you diffuse them in should always be well ventilated.


Also, studies show that diffusing (thus inhaling) essential oils for more than 60 minutes can raise blood pressure. They can make you more agitated and nervous.


Inhalation is the safest way to enjoy the benefits of your oils and get the relief and relaxation you want. How long should you diffuse essential oils? You should diffuse your essential oils for 20 – 30 minutes, every two hours.


It is known that our smelling receptors become numb after 20 minutes. Under these conditions, it makes the continuous diffusion of Aromatherapy oils a bit useless. Hours of diffusing Aroma oils can saturate the air and cause nausea and headaches.


Once you stop the diffuser, the oils will continue diffusing. You will thus continue inhaling them. This means the inhalation will last more than 30 minutes, but below 60.


Can I leave my diffuser on all night? No, you should not. Because of all the above-mentioned consequences, you should not sleep with the diffuser on.  Diffusing oils overnight may lead to poisoning.


Diffusing Essential Oils Guide


  • Why use essential oils in a diffuser and how to purify the air with one?


Pollution is charged with positive ions. According to the French physicist Jean Bricard, healthy air is charged with negative ions. For instance, at the top of the mountains or around waterfalls, the air is charged with fifty thousand negative ions.


In a forest, the charge is about three thousand and in an office, the charge drops down to twenty. Essential oils charge the air with negative ions.


Thus, the air purification can be done through the diffusion of essential oils. They can eliminate the positive ions of pollution and offer you purer air to breathe. Plus, they can also kill germs and bacteria (or viruses) too.


  • What type of essential oil should you use in a diffuser?


How to use essential oils in a diffuser is not complicated, but you need to make sure they’re good quality. 


To be effective and beneficial, essential oils need to be pure Aromatherapy grade. That way, you can use almost any essential oil you like.


There are a few exceptions though. There are a few dangerous essential oils that shouldn’t be diffused and you should know about them too. In the last chapter of this article, I will give you a list with them.


  • Can carrier (vegetable) oils be used in a diffuser?


Do I need to use a carrier oil in a diffuser, you ask. The short answer is no. Essential oils evaporate during the diffusion, while vegetable oils don’t. They will only ruin the glass or get stuck on the water recipient of your diffuser. Therefore, you should never use carrier oils in diffusers.


There are no special carrier oils for diffusers either. Essential oils mixed with vegetable oils are not recommended in diffusion, period.



  • How long do essential oils last in a diffuser?


When exposed to air, an aromatic oil oxidizes really fast. Before oxidizing though, it will first evaporate. When diffused again, the scent will not be as powerful, neither will its benefits. Thus, leaving a few drops of essential oil in your aromatherapy diffuser overnight is not a good idea.


You want to know how to make essential oils last longer in a diffuser? I’m afraid there’s no magical recipe for that. Each essential oil has its own different aroma intensity. Some will last longer, while others will evaporate faster.


  • How to put essential oils in a diffuser?


Simply pour your essential oil drops from their bottles directly into the water recipient. You can also make your own perfume blend separately and use it in a diffuser.

How to Use Essential Oils in an Aroma Diffuser?


  • Where to place your essential oil diffuser in a room?


It mostly depends on the type of diffuser, but most can be placed anywhere you’d like. Some make really nice furniture pieces that can decorate your house, while others have only a practical use (e.g.: cotton pads, Terracotta, etc.).


There are certain situations that won’t allow you to place your diffuser just anywhere. For instance, if you have kids, the diffuser should be placed somewhere high. See more in the last part of the post.


The best place to put an essential oil diffuser is somewhere you can see it easily. Somewhere you can have quick access to it, but far from the reach of children and pets.


  • How do you clean your essential oil diffuser?


It depends on the type of diffuser. If it has a special recipient for essential oils then you’ll have to clean it regularly.


Essential oils oxidize after a few days of being exposed to air. You should either use a few drops whenever you diffuse an essential oil, or replace them regularly.


If the recipient of the diffuser is plastic or ceramic, you can clean it with warm water and a bit of dish soap. If you’re using a nebulizer, the glass used there as a recipient may be very fragile.


To avoid damaging or breaking the glass you should make a vinegar and water solution. Spray it on all the parts, leave on for a few minutes and then rinse with lukewarm water.


  • Can you use a humidifer as a diffuser?


They are two separate products, but an ultrasonic diffuser can sometimes be used as a humidifier. It is not very powerful though, as it is not built for that purpose. If you use it in a very small room, then it could work. See more about diffusers vs. humidifiers.


  • Diffuser not emitting strong scents as you would expect it to do?


I’ve seen lots of people asking “why can’t I smell my oil diffuser?”. The answer to a faint aroma oil scent might be the oil itself. It must be 100% pure in the first place.


Make sure the diffuser is working properly by using a very strong essence like Ylang Ylang or Cinnamon. If the diffuser continues to emit faint scents or none at all, you should talk to the manufacturer and see what the problem is.


These would be the most common questions and answers for those who’ve never used a diffuser before.


Of course, if you have a question that I didn’t foresee, then please don’t be shy and ask me in the comments section. I’ll make sure to give you a clear and detailed answer.


Next on our list is finding out how to use essential oils in a diffuser in a simple way. But you will also find out more about the many types of diffusers that are available on the market, and not only.


Types of Essential Oil Diffusers and Ways to Diffuse Essential Oils


I have divided the types of essential oil diffusers in 3 categories. There will be inexpensive diffusers, moderately priced diffusers, and more expensive diffusers.


I will tell you how to use essential oils in diffusers from each category. You will then see their advantages and disadvantages and make informed decisions when buying one.



Inexpensive Essential Oil Diffusers


Ever wondered how can you use essential oils without a diffuser? If you did, then know that it is possible to diffuse aroma oils without diffusers too.


The following methods are extremely simple and inexpensive. You can test your oils with these methods before you buy a diffuser, or instead of one.


1) Tissue or cotton pad diffusers.


How to use essential oils in a diffuser so simple and inexpensive? The cotton pads will absorb the essential oils and disperse them into the air for a brief period of time.


Every time you move, it can send waves of essential oil molecules and fragrances. Add 4 – 5 drops of your favorite essential oil on a cotton pad and place it close by.


Unfortunately, in a matter of 2 or 3 hours, the scent will slowly fade away. Essential oils oxidize and evaporate in contact with air. That’s the main concern for using this diffusion method.


Replacing the pad each day would solve that problem though. Otherwise, you could still use it for a fast inhalation at work or on a bus.


Terracotta pottery (Aroma diffusers)
Terracotta pottery


2) Terracotta dishes or pendant diffusers.


How to use essential oils in a diffuser made from Terra-Cotta? Well, this fired clay is well-known for its porous and absorbent qualities. Once you pour a few essential oil drops onto a Terra-Cotta surface, it will start diffusing the scent right away.


This is the part where you should make sure you absolutely like the oil you’re diffusing. Otherwise, you’ll not be able to switch off the scent. However, the aroma will not last a long time and it will need constant refreshing.


Pendant diffusers are not only good for their therapeutic benefits, but they make really nice jewelry pieces too. They can be necklaces, rings or bracelets.


How to Use Essential Oils in a Diffuser


3) Steam diffusers.


This method requires some boiled water and a few drops of essential oil. The steam of the boiling water will help the oils disperse through the atmosphere.


Once the water cools off though, the oils will no longer be diffused. It will, however, work as a fast method to purify and remove foul odors before your guests show up.


The best part about Aromatherapy oils is that they can be used almost anywhere. Let’s say you need a little boost before starting your day, and you begin with a shower.


How do you use essential oils in the shower? You can simply pour a few drops on the floor of the shower. The hot water steam will lift up the molecules you’ll be inhaling.


Moderately Priced Essential Oil Diffusers


1) Electric essential oil diffusers.


How to use essential oils in an electric aromatherapy diffuser? The only difference between this diffuser and the candle burner is that you don’t need a candle anymore. When you turn it off, you don’t get a nasty smell like when using candles.


But the principle is the same. Heat will help the oil molecules disperse into the air and the scent can last a long time.


Add a few drops of your favorite essential oil or oils in a cup of water and place on the electric heat diffuser. Keep it plugged it for as long as necessary, and make sure you check on the water constantly.


The downside, however, is that high heat can also destroy the oil molecules. That will decrease the beneficial properties of your oils.


How to Use Essential Oils in a Diffuser


2) Candle burners.


How to use essential oils in a candle diffuser? You could let a candle burn for a few minutes until it melts and add a few drops in the melted wax.


Make sure you don’t pour the oils over the wick. Also, make sure you don’t keep it too close to your face when lighting the candle.


Essential oils are flammable, which means they can catch fire very fast. Or you can use a traditional ceramic oil diffuser (candle burner). It is a great way of diffusing essential oils with a candle.


You should check the water in the small recipient of the candle burner, as it will evaporate fast. Candle burners are a good way of controlling the scent and its intensity in your home.


Let the candle burn for 15 – 20 minutes and then put it out. Light it again in a few hours and make sure the room is well ventilated.


Allow at least an hour between changing essential oils in the burner. They are powerful and they can make you dizzy or nauseated if you diffuse too much or too often.



3) Ultrasonic diffusers.


These diffusers use water and ultrasonic waves. They help essential oils disperse better in the air and they can last a long time, even after turning them off. Ultrasonic diffusers can be programmed and they also make nice décor pieces.


At the same time, if it’s too cheap, an ultrasonic diffuser can also break more easily or stop working for various reasons.


More expensive ones will last a long time though. Add between 7 – 10 drops of essential oils in the bowl of the ultrasonic diffuser and let it wrap its mist around you. Depending on the manufacturer’s indications, you can add more or less EO drops.



More Expensive Essential Oil Diffusers


1) Nebulizers.


How to use essential oils in a diffuser that’s normally used in labs or for medicinal purposes?  It’s exactly this reason why they’re among the best essential oil diffusers right now. They’re also expensive.


The oil recipient is made out of a very fragile, but good quality glass. Nebulizers don’t need water, only pure essential oils.


There, the essential oil molecules are transformed into even tinier particles. They are released into a fine mist. That makes the oils last longer in the air, even 2 or 3 hours after the nebulizer has been stopped. This means that you should only diffuse for 10 – 20 minutes tops.


Nebulizers represent the latest in Aroma diffusing technologies. They are safer because they don’t use heat.


Follow the manufacturer’s indications as per how much water and essential oil drops you can use. Check out this article to see what makes them great for large space diffusion.


Now you know how to use essential oils in a diffuser, no matter the type you’re using. But you should also know about the precautions that go with their use.


Recommended Essential Oils per Type of Need and Precautions


You can control the intensity of your essential oils scent by adding more or less, depending on the space or need.


For instance, to improve respiratory problems during the cold season, you can add up to 10 drops of essential oil in your diffuser. For the other needs you can lower the quantity of essential oil drops accordingly.


Recommended essential oils to remove FOUL ODORS:


  • May Chang essential oil (also known as Litsea cubeba)
  • Pine essential oil.
  • Lavender essential oil (lavandula angustifolia)
  • Cedar essential oil.
  • Peppermint essential oil.
  • Juniper essential oil.
  • Lemon essential oil.



Recommended essential oils to REPEL INSECTS:


  • Geranium essential oil.
  • Peppermint essential oil.
  • Lemongrass essential oil.
  • Lavandin essential oil.
  • Clove essential oil.



Recommended essential oils for EASY BREATHING:


  • Rosemary essential oil.
  • Lavender essential oil (angustifolia type)
  • Peppermint essential oil.
  • Niaouli essential oil.
  • Eucalyptus essential oil.
  • Pine essential oil.
  • Chamomile essential oil
  • Thyme essential oil.



Recommended essential oils for TOTAL RELAXATION:


  • Sweet Orange essential oil.
  • Chamomile essential oil.
  • Marjoram essential oil.
  • Rose Geranium essential oil.
  • Ylang-Ylang essential oil.
  • Lavender essential oil.


How to Use Essential Oils in a Diffuser


Precaution measures needed when using essential oils in a diffuser


There are a few things you should take into consideration before and during the diffusion of essential oils:


  • Children and pets should not be exposed to intense essential oil diffusions. You can either keep the diffuser in a room where they don’t have access, or put it some place wide and high enough to enjoy a subtle aroma.


  • Pregnant women, diabetics and people with other health conditions should not diffuse essential oils for a long time. Or without the consent of a doctor.


  • Test the essential oils you want to use for allergies. Pour a drop on your wrist or soft inside of the elbow and wait a few hours. Make sure there’s no allergic reaction before using them.


  • Don’t diffuse essential oils continuously. They may cause headaches, nausea, vertigo and even vomiting.


Here are those essential oils that are considered irritating to the mucous membrane. They should not be diffused at all if there are other health concerns involved. Or diffuse a very tiny amount in a wide space to avoid irritating your nasal passages.


  • Peppermint essential oil.
  • Thyme ct. thymol essential oil.
  • Caraway essential oil.
  • Clove essential oil.
  • Cinnamon essential oil.
  • Lemongrass essential oil.
  • Bay essential oil.



The purpose of this article is to help all beginners learn how to use essential oils in a diffuser. Besides that, you’ve also found out the reasons why people like or need to diffuse essential oils in their living or working space.


Just a few drops of a favorite essential oil and everything might change for the better in an instant.


Make sure you don’t overuse them and be careful with those that can irritate the mucous membrane. Be safe and enjoy the benefits of essential oils every day, in your improvised or bought diffusers.


What type of essential oil diffuser are you using? How many times a day do you use it? I would very much like to know which ones are your favorites.


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45 thoughts on “How to Use Essential Oils in a Diffuser (A Beginner’s Guide and FAQ)”

  1. I purchased an ultrasonic diffuser and want to try making my own blends. I am wanting to use a recipe that uses chamomile but the shop where I purchase essential oils only carries 10% chamomile with 90% jojoba oil. Can I put this in my diffuser or will it clog it?

    1. Hey Izzy, thanks for your comment!

      Carrier oils should not be used in diffusers, especially ultrasonic or nebulizing ones, because they can clog the device. I suggest finding pure, undiluted essential oils to mix and use in your new diffuser.

      Take care now 🙂

  2. Hello, information you give above is easy to understand do not have to much unneeded details
    And is usefull. The only thing I cant find is how often I can diffuse oils at home.
    I have ultrasonic diffuser and need to know if I can use it every day, or only couple times a week.
    I would like it 24/7 to be on  is this harmfull?

    1. Hi Simona,

      Thank you for your feedback, I’m always happy to know my articles are useful to my readers. That’s an excellent question!

      You can use your ultrasonic diffuser every day, as long as you do it in a well ventilated room and don’t diffuse for longer than 30 minutes, once every two hours.

      If it has a timer and you can set it to start diffusing every 2 hours, you could also keep it on 24/7. I’ve also added this information in the article.

      Hope to see you around! 🙂

      1. Hello, thanks to your replay. My diffuser only has time for 1-3-6 hours to be on. Can you let me know any diffusers which can be set up for periods of time. Like you mentioned 30 min on and sime time off and then back on again. Many thanks

        1. Unfortunately, I haven’t found one either yet.
          Just like you, I have to turn it off manually, or program it for one hour.
          It’s not ideal, but I don’t mind 🙂

  3. Hi and thank you for the information that I have seen. I was given an Aroma Diffuser and the name is EASEHOLD Aroma Diffuser. I have never used a diffuser. I need to know how to use it and when I need to clean it. Right now it has a strong smell of something like Christmas smells. I would like to get rid of that and use another. It doesn’t have any water in it. Does it automatically change when you use another fragrance?

    1. Hi Marsha,

      I suggest washing the water recipient of your diffuser like the manufacturer says, or as I suggest in one of the questions in this article. It depends on what it is made of… you could use warm water + soap or vinegar + water. That will remove all traces of fragrance left from previous uses.

      I’m not sure what you mean with the last question, but the water recipient needs to be refilled every now and then, to diffuse the oils properly.

      I hope this helps 🙂

  4. Hi

    Thanks for your post. I just got my essential oils and diffuser.

    I am diffusing thieves and the recommended time is 10mins per diffusion. Is it harmful to let it run longer?

    Also, if I stop diffusion every 20minutes, can I just leave the water and oils inside? Then switch on for the next diffusion, say next day?

    Does the essential oil evaporates in the water or lose its effectiveness in time?

    Are there any essential oils that I can diffuse for hours and still give good effects?

    Will appreciate your reply thx :)))))

    1. Laura Sumner

      Hello Nn,

      Thank you for your comment 🙂

      You can diffuse your oils for up to 30 minutes, every 2 hours. The idea is to not inhale them for more than 60 minutes, or else instead of relaxation and feeling good, all oils can do the opposite. That’s what studies show. You can’t diffuse them for hours because of this reason.

      Leaving an essential oil in water over night will lose its power because they evaporate quite fast. I suggest using only a few drops per each diffusion. Essential oils can loose their effectiveness in time, especially if they’re not held in dark, cool places or if they’re kept with their caps off for a long time.

      I hope this helps 🙂 and see you around!

  5. Hi!
    Thank you for your very helpful post!!
    I just bought diffuser and oils from Scentsy. My diffuser has a timer for 4 or 8 hours and was told I could run it all night and be fine with the automatic turn off. I see now that that’s not a good idea. Also, will it negatively affect my cats, either from the mist or scents? And lastly, placement of the diffuser, I know I should not place it around any electronics, as that just doesn’t seem wise. But what about alongside of bedtable lamps or overhead light fixtures such as a bathroom? I don’t want the mist to destroy anything. ?

  6. Hi! Me again!
    I also have a few salt lamps in my bedroom, will that be too much? I love the dim lighting for the room at night, but they can be removed..
    Thank you so much!

    1. Hi Cirilla,

      Thanks for your comments 🙂 Essential oil scents may affect cats indeed. They are more sensitive than dogs and their bodies can’t process most molecules.
      As for the placement of a diffuser, I suggest keeping it in a place without electronics around. They don’t create condensation, but the oil molecules might settle on them and gather dust, etc. If your diffuser has a vapor setting, you could simply turn it off.

      Regarding the salt lamps, I’m not sure what the result would be, but on a long term, they might become damp if there’s too much moisture in the room.

      Hope it helps 🙂

      1. Hi Laura! Thank you so much for your reply, you are sooo helpful. Would you suggest to not use a diffuser if cats are present? The last thing in the world I would want to do is harm my cats, they are my kids.
        Once again, thank you!!!

        1. You’re very welcome Cirilla 🙂
          I do suggest avoiding diffusing essential oils if cats are present. It’s too risky.

  7. Hello and thank you for this article! I recently purchased a Levoit cold mist diffuser and read that I should only be using water soluble EO, but aren’t all 100% EO not water soluble, as they float on top of the water? If so, what should I be using and/or is there a way to make them water soluble? Thank you for your help!

    1. Hello Emily,

      You are right, there is no such thing as water-soluble oils. They can be mixed with an emulsifier to bind and mix with the water. But I don’t see the point of diffusing an emulsion.
      Pouring the oil drops into the water is what helps them diffuse easily and for a longer time.

      I hope this helps 🙂

  8. hello , appreciate your efforts .
    i have a question to ask , that i have many birds at my home and want to use Lavender oil , so can you please suggest me how to use it so my birds can also take benefit from this therapy instead of any side effectss

    1. Hello Bilal Ali,

      From what I’ve read, it seems that diffusing essential oils around birds could cause problems due to the way their respiratory system works. Unfortunately, I couldn’t find any studies to back that up.

  9. Hi Laura,
    I have the Olive Tech 400 ML cool mist humidifier diffuser. Do you have any suggestions on what oils and amounts I could use at night to help clear sinuses (breathing) and relaxation?

    1. Hello Ann,

      To clear sinuses, essential oils like Eucalyptus, Niaouli and Pine can help. For relaxation: Lavender, Rose, Citrus, Ylang-Ylang, etc. 6 drops of EOs for a medium-sized room should be enough.
      I don’t recommend diffusing them the whole night though. They can saturate the air and cause headaches among others.

  10. I just bought a diffuser for the first time and I ran it for about 1 hour. I noticed water mist from the diffuser all over the table. Is this normal? Do you have to place diffuser under something so this doesn’t happen and ruin the table?

    1. Hi Ann,
      Maybe you could select a different misting program? Some diffusers have that option. Otherwise, I would indeed recommend placing the diffuser on a piece of cloth or something.

  11. Hello Laura ,
    Perhaps you can clarify for me as I just bought a beurer LA10 Aroma Diffuser where the
    Instruction states to use Water Soluble Oils only .
    According to what I have read so far there’s no such thing as Water Soluble Oils only so I am not sure how to determine exactly which or what kind of essential oils to use with this device.
    I purchased some Nature’s Truth
    Aromatherapy Essential Oil that states it’s 100% Pure.
    Is this product safe to use with the type of Diffuser ?
    Any help that you could provide would be greatly appreciated!

    1. Hello Anne,

      Indeed, there are no water soluble oils. They can be transformed into emulsions, but that’s not a worthy effort.
      You can use any type and brand of essential oil with your diffuser.

      1. Laura, Thanks so much for your quick response. I am new to this and appreciate all of your information.

        I just wanted to make sure that I am understanding all that comes with using Essential Oils safely as well as not to be throwing good money out for bad money especially since there’s so much misinformation out there .
        Thanks again for your help !

  12. I just bought essential oils and a diffuser and I was so excited to use it. The diffuser is a ultrasonic aromatherapy diffuser and it is supposed to light up in different color but the light is not coming on. I am wondering am I supposed to charge it prior to using it?

  13. Using essential oils just lays on top of the water. That means the most is nothing but water vapor and the oils are trapped inside the ultra sonic enclosure Can you REALLY use oil based anything in ultra sonic or nebulizers???

    1. Hi Rick,

      Essential oils are volatile substances and all water does is to increase the temperature at which they evaporate.
      Nebulizers and ultrasonic diffusers use different technologies that help disperse the oil molecules throughout the air.

  14. I have an ultrasonic diffuser and want to use it to alleviate asthma and help me to sleep, I’ve been using eucalyptus for Asthma and Lavender for sleep. Is it safe to use either for 1 hour as I have a dog and 3 cats that are usually in the same room? I’ve read it’s dangerous?

    1. Hello Ali,

      Unless a doctor says so, people with asthma should stay away from Eucalyptus, especially the globulus variety!
      If it can be toxic to humans, it is to pets too, especially cats. I suggest reading my article on essential oils for cats, for more details.
      Take care.

  15. Received a nebulizer for Christmas and am not familiar with essential oils. Do you have suggestions and what I should start with?

    1. Hello Donna,
      I would suggest trying some citrus essential oils at first (Sweet Orange, Grapefruit, Mandarin, Lemon, etc.).
      They’re light, fresh and uplifting, and most people love them.

  16. I am new to using essential oils and decided to try a sleep blend since that is my biggest issue. However if no diffusers are made that allow you to shut them off after 30 minutes are you saying you need to stay awake at least long enough shut them off? It has been working really well for me obviously because i am not awake to shut it off after 30 minutes so if i am getting overdosed how will i know. I have been having issues with feeling nausea in the morning and am wondering if its that? I don’t know exactly when the diffuser shuts off as it is automatic and is off in the morning when i am awake. I am so confused as to how to handle this as i don’t really want to give it up. Any suggestions? I normally only use about 3 drops every night

    1. Hello Barb,

      I can’t encourage you to fall asleep with the diffuser on. Studies don’t support this practice for the reasons I mentioned in the article. Better use it before bed, which will be just as effective. Also, the nausea could be a symptom of overdiffusing.

  17. Hi,
    I bought a nebulizer diffuser from Hysses. It is a product from Singapore. The diffuser has a setting for 2 hours and will off automatic after 2 hours. It has another function where it will diffuse for 1 minute and off for 2 minutes. Can you advise if this is safe?

    1. Hi Mok,

      It should be safe if you let it run for 20 – 30 minutes and then turn it off manually, or use the 1 minute on – 2 minutes off setting for an hour.

  18. Marci j Gallagher

    A friend just gave me a beautiful diffuser, however it is old and has a wick. I have not a clue as to how to use it. Do i light the wick, do i micpx oils with water.

    1. Hi Marci,

      There are many types of diffusers that use wicks.
      I suggest reading my article on how diffusers work and get an idea as to how to use yours.
      Good luck.

  19. I’ve been using my diffuser on the “continuous” setting and have been sleeping with it on all night. I have not had headaches or nausea. I find that the aromas are pretty much gone by the time I wake up. Could this have a cumulative negative effect on my brain or something else? Can you recommend the best brands? Or is that “verboten”?

    1. Hi Peeps,

      Oil molecules can build up, saturate the air and linger for a long while. Research shows that the human nervous system is negatively affected by continuous inhalation. I don’t choose my oils by brand, I just buy whatever meets my criteria.

  20. Hello there, I have a couple of questions for you. I just bought an ultrasonic diffuser from Walmart to use at night in the bedroom for my hot flashes and relaxation.

    Hubby goes to bed about 3 hours before me and I’m not quite sure when to turn it on and for how long so we both get the benefit without him getting too much. What would you suggest?

    My other question, when using 2 oils do you just drop them in or should you blend them first?


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