Certain recurrent ulcers appear on movable mucosa. They are discrete, round-to-oval ulcers that are 3 to 5 mm in diameter and exhibit a yellowish-white fibrin center surrounded by an erythematous halo. They are called:

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These are characteristic features of minor aphthous ulcers, which typically occur on movable mucosa such as the tongue, lips, and cheeks. Major aphthous ulcers are larger, more painful, and take longer to heal, while herpetiform aphthous ulcers are smaller and have a cluster-like appearance. Sutton disease refers to a type of erythema multiforme characterized by target lesions on the skin.

Certain Recurrent Ulcers Appear on Movable Mucosa