Treatment for skin with acne - Acne is caused by an excessive secretion of sebum. Excess sebum creates bacteria proliferation, which produces an additional inflammatory process, and also stimulates hyperkeratinization and the subsequent blockage of the hair follicle. As a result, comedones, pustules, nodules and cysts appear on the skin. Pur-Skin balances and regulates excessive sebaceous secretion and restores the hygienic condition of the skin, whilst respecting its natural ecosystem.