Acne vulgaris (AV) is a hereditary skin disease that affects about 50 million people in the US. Acne occurs most often between the ages of 15 and 18. Acne tends to resolve by age 25 but it can result in permanent scarring of the skin, and leave emotional scars as well. Acne is usually more severe in males but tends to persist longer in females. A low-grade, persistent form of acne is common in women who may experience periodic flare-ups prior to their menstrual period that last until menopause.
Acne rosacea (AR) is a skin condition similar to acne vulgaris that typically occurs after the age of 30 and is usually chronic, characterized by exacerbations and remissions that go on for years. Rosacea is prevalent in people of Celtic ancestry. The forehead, cheeks, and nose are most commonly affected sites, although lesions sometimes appear around the eyes. Inflammation of the nose occurs in some individuals and results in a red, bulbous nose, a condition called rhinophyma.
Seborrheic dermatitis (SD) is a common, chronic inflammatory condition that affects from 2% to 5% of the population. Genetic and environmental factors are thought to influence both the onset and the course of the condition. SD has a tendency to develop in certain body areas— the so called seborrheic (oily) areas—including the scalp, eyebrows, nose creases, lips, base of the eyelashes, ears, armpits, and groin. It is characterized by the formation of loose scales that may be dry, moist, or greasy, with yellow or pink crusts.