Site of action of anti acne. Cut of skin of the epidermis and dermis. Left, a normal hair follicle in the center an acne pimple around the hair follicle with hyper-keratinization and inflammation of the epidermis caused by glycerides (in yellow) under the action of bacteria Propionibacterium acnes (in red) . The sebaceous gland is in hypersecretion. Polynuclear blood vessels are flowing.