Pharyngeal ulcer

An ulcer is a localized defect or ulcer on the surface of the skin or mucous membranes. The surface is often covered with pus, necrotic tissue, or crusts, and scars are left after healing. It can be caused by infection, trauma, nodules, or tumor ulceration. Its size, shape, depth, and development process are also inconsistent. Chronic infections are common and may persist. There are many causes of pharyngeal ulcers, for different reasons. Except for some special infections (diphtheria, tuberculosis, syphilis, induration, etc.) and pharyngeal tumors, the more common ulcerative pseudomembrane lesions.

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