Sexually active male comes with complaints of recurrent ulcers over the glans which heals with hyperpigmentation, probable diagnosis is -: (A) Aphathous ulcer, (B) Fixed drug eruption, (C) Herpes genitalis, (D) Chlamydial infection
Answer is B. Fixed drug eruption manifests as skin lesions at fixed sites following drug intake. The lesions progressively fade over several days often leaving a residual post inflammatory brown pigmentation. Page no.294. Reference IADVL's concise textbook of dermatology