Journal of Rheumatic Diseases

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Fig. 1. Clinical features of recurrent oral aphthous ulcers. (A) Minor ulcers, (B) major ulcers, (C) herpetiform ulcers. Ulcers ≤1 cm are considered minor ulcers while larger ulcers are considered major ulcers. Multiple scattered ulcers of several millimeters are considered herpetiform ulcers. Major ulcers may cause mucosal scarring and persist several weeks or longer.
J Rheum Dis 2021;28:183~191
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