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A 48-year-old member asked:

Recurring canker sores? why do i get them?

2 doctor answers4 doctors weighed in
Dr. Charles Cattano
Gastroenterology 39 years experience
Depends on cause: Aphthous stomatitis involving the common canker sore can occur in up to 15% of americans, and may involve some bacteria like staph epidermidis. However, similar-appearing aphthous ulcers can be seen with herpes, crohn's disease, and other systemic disorders, if you have multiple aphthous ulcers or frequently recurring ones please have the lesions checked out.
Dr. Richard Ruden
Dentistry 38 years experience
Many causes: The cause of canker sores is not well understood. More than one cause is likely, even for individual patients. Canker sores do not appear to be caused by viruses or bacteria, although an allergy to a type of bacterium commonly found in the mouth may trigger them in some people. The sores may be an allergic reaction to certain foods. In addition, your own immune system can cause them.

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Canada
A 19-year-old female asked:

Why do I get reoccuring canker sores?

3 doctor answers12 doctors weighed in
Dr. Jack Mutnick
Allergy and Immunology 17 years experience
Canker Sores: Canker sores are due to herpes simplex virus type 1. It is very very common. A ton of things can cause recurrent outbreaks. You can buy over-the-counter treatment or see your primary doctor who can prescribe as needed tablets for outbreaks or might opt to put you on daily suppressive therapy. Hsv-1 is painful and unsightly, but don't worry because stress only makes them happen more often.
Dr. Michael P Vaughn
Allergy and Immunology 34 years experience
The term "cancer sore" can also refer to apthous ulcers that occur on the wet mucous membranes inside the mouth. These are not thought to be due to herpes virus and they will not typically improve on herpes medications. Daily suppressive therapy with these medications (acyclovir/ famcyclovir etc.) will not usually be effective.
Feb 23, 2012
A 46-year-old member asked:

Why do I get canker sores easily?

2 doctor answers7 doctors weighed in
Dr. Debi Williams
Dentistry 26 years experience
Virus and Stress: Canker sores (aphthous ulcers) may be caused by a virus that stays inactive in your body until you are stressed or experience illness such as a cold. In addition, it could be caused by a vitamin B12 or vitamin d deficiency. Take a multi-vitamin everyday, spend some time in the sun, and find ways decrease stress. Your dentist or doctor can also prescribe an antiviral.
Dr. Larry Lutwick
Infectious Disease 49 years experience
Aphthous ulcers are not clearly due to a virus.
Oct 8, 2012
A 31-year-old member asked:

How come i get canker sores so much?

2 doctor answers3 doctors weighed in
Dr. Sandra Eleczko
Dentistry 36 years experience
Hard to say: It is hard to say why you get a lot of canker sores. Some people are sensitive to sls in toothpaste or to cinnamon so try eliminating these. Try to reduce your stress. If you get a lot or if they are large you should see your doctor and have your immune system evaluated.
NY
A 25-year-old member asked:

I get canker sores often. What is causing this?

4 doctor answers7 doctors weighed in
Dr. Thomas Yash
Dentistry 46 years experience
You are susceptable: Basically, once you get canker sores, you will occassionaly get them again. This autoimmune lesion is set off by various triggers, stress, or trama. Some triggers could be foods(peanuts, spicy food), drinks (red wine), or a cold. It varies with the individual.
A 35-year-old member asked:

Why am i get canker sores back to back? What makes me so susceptible?

2 doctor answers2 doctors weighed in
Dr. R Lee Hinson
Dentistry 38 years experience
Your description: Sounds like recurrent apthous stomatitis or a trauma ulcer. There is a relationship to immune system issues. These can be quite painful for a few days, then they hopefully resolve. Avoid acidic foods & toothpaste w sodium lauryl sulfate. Look for zilactin b at your pharmacy. If these lesions are not gone in 10-14 days let ur dentist evaluate the area. There are prescriptions to help as well.

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Last updated Apr 16, 2016

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