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Canker Sore
A canker sore is a mouth ulcer or sore that is open and painful. The most common sign is a burning or tingling in an area of your mouth that the red sore appears. More »
Source: healthline.com

en.wikipedia.org/wiki/Aphthous_stomatitis

Aphthous stomatitis is a common condition characterized by the repeated formation of benign and non-contagious mouth ulcers (aphthae) in otherwise healthy individuals. The informal term canker sores is also used, mainly in North America, ...

www.webmd.com/oral-health/guide/canker-sores

Jun 10, 2016 ... Canker sores appear in the mouth and can be painful. Learn from the experts at WebMD about causes, symptoms, and treatment.

www.webmd.com/oral-health/tc/canker-sores-topic-overview

What is a canker sore? A canker sore is a shallow sore shaped like a crater (ulcer ) on your tongue or on the inside of your lip or cheek. Canker sores have a red ...

www.medicinenet.com/canker_sores/article.htm

Canker sores are small painful sores on the inside of the mouth. Causes like spicy foods, vitamin deficiencies, stress, autoimmune disorders, and hormone ...

www.healthline.com/health/canker-sores

Oct 10, 2016 ... A canker sore, or aphthous ulcer, is a mouth ulcer or sore that's open and painful. It's the most common type of mouth ulcer.

www.medicinenet.com/canker_sores/page2.htm

What are canker sores, and what do they look like?

www.mayoclinic.org/diseases-conditions/canker-sore/basics/causes/con-20021262

The precise cause of canker sores remains unclear, though researchers suspect that a combination of factors contributes to outbreaks, even in the same person.

www.mayoclinic.org/diseases-conditions/canker-sore/basics/definition/con-20021262

Mar 19, 2015 ... Canker sores, also called aphthous ulcers, are small, shallow lesions that develop on the soft tissues in your mouth or at the base of your gums.

www.rd.com/health/conditions/home-remedies-canker-sores

These natural home remedies will cure your canker sore and help it heal quickly.