Canker sore: canker sore AKA aphthous stomatitis is a common oral ulcer that has uncertain causes. it is thought to be a change in the immune system. There are many other possible types of oral ulcers related to inflammatory bowel, celiac disease, infections or immune diseases. Canker sores are often treated with topical steroids or topical pain relief, avoiding irritation and good oral hygiene. See your MD
Answered 1/16/2020
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