Acne vulgaris, also known as common acne, is an inflammatory condition of the sebaceous glands of the skin. It consists of red, elevated areas on the skin that may develop into pustules and even further into cysts that can cause scarring.
Acne vulgaris occurs mostly on the face, neck, and back of most commonly teenagers and to a lesser extent
of young adults. The condition results in part from excessive stimulation of the skin by androgens (male
hormones). Bacterial infection of the skin also appears to play a role.