Diseases

Aphtthous Ulcers (Canker Sores)

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A small painful ulcer especially of the mouth; especially : a painful shallow ulceration of the oral mucous membranes that has a grayish-white base surrounded by a reddish inflamed area and is characteristic of aphthous stomatitis — compare cold sore.

SYMPTOMS

The main symptom is a painful sore in the mouth that can make it hard to eat and talk.

CAUSES

Multiple factors may cause canker sores, including injury to the mouth, acidic or spicy foods, vitamin deficiencies, hormones, stress, or autoimmune disorders. Canker sores are not the same thing as fever blisters (cold sores). Most canker sores require no treatment and heal on their own.