Should You Use Hydrogen Peroxide For A Toothache?

Updated: Jun 19

Are you experiencing some tooth pain and looking for an antiseptic rinse that can alleviate the pain? Will hydrogen peroxide work?

Hydrogen peroxide
Hydrogen peroxide

Table of Contents:



How to use hydrogen peroxide for a toothache.

It is very easy to make a hydrogen peroxide rinse for tooth pain because you only need three ingredients. They can all be purchased at your local pharmacy or supermarket.

  1. Fill up half a cup with 4 oz of room temperature water.

  2. Add 4 oz of hydrogen peroxide in a 1:2 ratio.

  3. Lightly stir the mixture.

  4. Gargle and swish with the rinse for 30-60 seconds.

  5. DO NOT SWALLOW IT. Spit it out and rinse with water.

  6. Repeat for up to three times a day as needed.



Can hydrogen peroxide help with tooth pain?

Hydrogen peroxide can help alleviate a toothache because it is an antiseptic. It has bacteriostatic and bacteriocidal properties according to this study. A 6% solution was able to kill half of the bacterial specimen within 15 seconds of rinsing.

  • The concentrations available for purchase from your pharmacies are at 3%.


The effects of hydrogen peroxide as listed on the product label:

  • Antiseptic

  • Oral debriding agent

  • Treats minor cuts and abrasions


Since the peroxide does have the ability to kill bacteria and can be used as an oral debriding agent, in which situations would it help with tooth pain?

  • Pain from bleeding gums. If your gums are bleeding due to gingivitis or periodontitis, rinsing with hydrogen peroxide will help alleviate pain by reducing the bacterial load present in the mouth. Please be aware that this will only temporarily help with the toothache because gum disease needs to be permanently treated by a dentist. The cure would be either a teeth cleaning or a deep cleaning.

  • Mild gum infection or abscess. If you're experiencing some gum swelling from a mild infection or a small abscess, the rinse can fight some of the bacteria. Rinsing with it will definitely prevent the swelling from getting worse by keeping the bacteria population under control. This will stop the tooth pain from getting worse, at least until you can get an appointment with one of our long island city dentist. The abscess will need to be drained.



When should you not use hydrogen peroxide on teeth for pain?

It may be a great antiseptic but it does not mean that you can indiscriminately use it for all types of tooth pain. In fact, it can make your teeth hurt when you rinse with hydrogen peroxide for the wrong reasons.

  • Rinsing on an exposed tooth nerve. If there is a big cavity that has an exposed tooth nerve, the rinse can aggravate it and give you a severe toothache. Tooth nerves are normally covered and protected from external stimuli so they are not use to a powerful antiseptic coming into contact with it. Therefore, peroxide will not kill a tooth nerve but what it will do is irritate it more.

Exposed tooth nerve
Exposed tooth nerve

  • Using it when your crown fell off. Your crown not only protects your teeth from chewing forces but also from cold air and any irritating rinses that may come into contact with the dentin. The dentin is very sensitive so the peroxide will make your tooth feel like it is burning. It is similar to rubbing alcohol on a cut, it will hurt.

Half fallen off crown
Half fallen off crown

  • Rinsing more than once on an open wound. If you have a cut or a sore in your mouth, you are only suppose to rinse with the peroxide one time to disinfect it. It will hurt when you rinse with it but you need it to disinfect the wound. Afterwards, you're suppose to switch to a more gentle mouth rinse such as salt water.

So yes, in some situations it is better to gargle with salt water vs hydrogen peroxide because it is more gentle on the wound. In fact, using the peroxide too frequently may delay healing because it is so acidic and it will not promote wound healing.



Take away

Hydrogen peroxide is a viable home remedy for alleviating toothaches but only in certain situations. There are some scenarios where it may not be helpful and may even make your tooth pain worse. If you're unsure about what to do, you can always see one of our LIC dentist for a consultation to answer your questions or potentially permanently fix the problem.


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About the author: Dr David Chen, DDS

Hello, I'm Dr Chen and I'm an actively practicing dentist in Long Island City, NY. I graduated from Columbia University College of Dental Medicine in 2016 but prior to going to dental school I was already working in the dental field. It's been more than a decade since I first got to know dentistry and let me tell you, time flies by quickly. Since then I've developed a fondness for writing, which is how this all got started!

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Medical Disclaimer:

This blog is purely meant for information purposes and should not be used as medical advice. Each situation in your mouth is unique and complex. It is not possible to give advice nor diagnose any oral conditions based on text nor virtual consultations. The best thing to do is to go in person to see your dentist for an examination and consultation so that you can receive the best care possible.

The purpose of all of this oral health information is to encourage you to see your dentist and to inform you of what you may expect during your visit. Due to the unfortunate nature of dentistry, there isn't really any true home remedies that will get rid of dental problems. Roughly 99.99% of them require in-person intervention by a healthcare professional.

Hint: That is the reason why you can't eliminate seeing dentists in your life!