How to get rid of canker sores and mouth ulcers Fast
Canker sores, also known as mouth ulcers, or aphthous stomatitis, can form on the gums, inner cheeks and lips (anywhere inside of the mouth). Canker sores, while annoying, are common, and usually heal in a week or two. They are not to be confused with cold sores, which form on the outside of the mouth. Here are a few suggestions to help deal with these pesky ulcers.

Treating Canker Sores with Home Remedies

Use a salt or baking soda rinse. Mix a few pinches of salt in a glass of warm water. Swish around inside your mouth and spit out, repeating two or three times a day.
An alternative to this is baking soda. Mix one teaspoon baking soda with several ounces of warm water. Swish and spit out.
Alternatively, create a paste with equal parts baking soda and water. Dab the paste over the canker sore with a Q-tip and let dry.
Salt water and baking soda both help the mouth heal itself by reducing the acidity and bacteria in the mouth.

Use a 3% hydrogen peroxide solution.
Pour a little bit of it into a plastic soda cap and dilute with an equal amount of water.
Dip the Q-tip into the peroxide solution and dab it only on the canker sore.
Turn the Q-tip around and repeat.
Empty the cap and rinse it with water.
Take care not to swallow any of the hydrogen peroxide if possible.
Hydrogen peroxide is an antiseptic that will reduce the amount of bacteria in your mouth and help the canker sore heal.
The canker sore should go away in about 2-3 days if you do it twice a day.

Use milk of magnesia. Dab it on active spots a few times a day. The antacid effect of milk of magnesia neutralizes the acidic environment, changing the pH, and making it less supportive of the bacteria in the mouth that aggravate the canker sore.[3]

Use an antihistamine/antacid mix. Combine one part diphenhydramine (sold as Benadryl) with 1 part antacid, such as Maalox or Kaopectate. Swish around your mouth and spit out.

Use OTC mouthwash. Regular old mouthwash does work, although there are different OTC mouthwash solutions that are specifically targeted to help treat canker sores. They include:
Diphenhydramine suspension washes (Benadryl Allergy liquid and others). These types of washes generally treat the pain of the canker sore. The mouthwash solution should not be swallowed.

Treat the pain (optional). You can take over-the-counter painkillers, or apply benzocaine gels (such as Anbesol and Orajel) directly onto active sores.
Suck on ice chips. Try to hold them over the sores, allowing them to melt over the area. Ice should help numb the pain and reduce inflammation.

Try other miscellaneous remedies. Three of these remedies are designed to change the pH in your mouth. The theory here is that changing the pH will make your mouth less hospitable to the bacteria that are causing the canker sore:
Eat yogurt daily.
Apply a wet black teabag to the ulcer.
Squeeze the oil of a Vitamin E capsule onto the sore, repeating several times per day.
Image titled Treat Canker Sores or Mouth Ulcers Step 138
Use a lemon. Squeeze the lemon with a lemon squeezer or just squeeze is on the ulcer straight away.
If you squeezed the lemon with a lemon squeezer, wash your hands, put your finger in the juice then dab it on your ulcer.
Repeat it before breakfast, after breakfast, before lunch, after lunch, before tea, after tea, before dinner, after dinner and right before you sleep.
Leave it on for 1-5 minutes. Then rinse off, if needed.

Knowing When to See a Doctor

Visit a specialist if you get frequent sores. If you’re constantly battling canker sores and none of the above fixes are working, perhaps there’s an underlying issue. For some conditions, canker sores are an early and important sign that something else is wrong.

Schedule an appointment with a gastroenterologist. Consider investigating whether you have Celiac Disease, Crohn’s Disease, or inflammatory bowel disease. All three are autoimmune conditions that can cause frequent mouth sores.
You might also ask the doctor if it’s possible you have Helicobacter pylori, more commonly known as H. pylori, which can cause stomach ulcers.

Schedule an appointment with an immunologist. If you’ve ruled out gastrointestinal disease, consider visiting an immunologist. There are a few rare immune conditions that can manifest as persistent mouth sores.

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