Acne vulgaris is a chronic inflammatory skin disease of the sebaceous glands of the hair follicles. It occurs mainly in adolescents and tends to diminish or heal naturally after puberty. Clinical manifestations include acne, papules, pustules, nodules, and other polymorphic lesions on the face and also on the back and chest, which often leave pigmented spots or scars after the inflammation subsides. The occurrence of acne is mainly related to excessive sebum production, blockage of hair follicle sebaceous ducts, bacterial infection and inflammatory reaction. According to Chinese medicine, the disease is caused by a loss of spleen health, dampness and heat due to a poor diet and excessive consumption of sweet and sour foods.