How to Make Mouthwash With Peroxide


If you suffer minor gum irritation or inflammation, a healing mouthwash made from simple hydrogen peroxide can help your mouth heal. Whether you have an injury, canker sore infections or you are recovering from a procedure in your mouth, hydrogen peroxide can help keep your mouth clean, which can reduce infection and complications. The U.S. National Library of Medicine recommends using hydrogen peroxide as a mouthwash rinse to treat mouth sores.

Things You'll Need

  • 3 percent hydrogen peroxide
  • Small glass
  • Mix about 1/2 oz. hydrogen peroxide with 1/2 oz. cool water in the small glass.

  • Pour the diluted hydrogen peroxide into your mouth and swish the liquid around your mouth.

  • Continue swishing the liquid in your mouth for about one minute then spit it out.

  • Repeat the hydrogen peroxide mouthwash up to four times in a 24-hour period. Rinsing after meals can be especially effective.

Tips & Warnings

  • Supervise children under 12 when they use hydrogen peroxide mouthwash.
  • Consult a physician or dentist before using a hydrogen peroxide mouthwash on a child under 2 years of age.
  • Do not use the hydrogen peroxide mouthwash for more than seven consecutive days.
  • Stop using the hydrogen peroxide if your symptoms become worse.
  • Never swallow hydrogen peroxide -- it is poisonous. Call Poison Control if accidental ingestion occurs.

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  • Photo Credit brown bottle image by Jim Mills from
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