Mouth Ulcer and Its Types

A mouth ulcer is an open sore inside the oral cavity. Two common mouth ulcer types are aphthous ulcers (canker sores) and cold sores (caused by the herpes simplex virus).

The types of oral ulcers are diverse, with a multitude of associated causes including: physical or chemical trauma, infection from microorganisms or viruses, medical conditions or medications, cancerous and sometimes nonspecific processes. Once formed, the ulcer may be maintained by inflammation and/or secondary infection.

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