(1) Psoriasis. Psoriasis is a chronic, recurrent disease of the skin, characterized by reddish, rounded lesions that are covered by silvery scales. When a scale is removed, it leaves a small bleeding point. The disease tends to begin on the elbows, knees, or scalp, and to spread over the whole body.
(2) Acne vulgaris. Acne vulgaris is a chronic inflammation of the sebaceous glands (oil glands) of the skin, which usually develops during adolescence. Lesions develop rapidly and in crops, located mostly on the face, sometimes on the sternal region, the shoulders, and the back. The lesions may cause considerable scarring on healing. Treatment includes good personal hygiene to help prevent secondary infections, dietary measures, antibiotics, and various skin lotions.
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