Adolescence
Pityriasis Rosea
Psoriasis (especially of the Guttate type)
Bibliography: Dermatology, An Illustrated Text and Atlas, 2nd Edition
Acné
Dr Christophe Hsu – dermatologist. Geneva, Switzerland Acne Vulgaris What is the cause of acne? There are several causes of acne. One theory is that when the male hormone level (testosterone) increases during puberty, the skin of an acne prone person reacts to the hormone and produces excess sebum. No one knows why some individual’s…