Rosacea is a chronic, progressive skin disorder affecting the nose, cheeks, chin or forehead. It usually begins with a persistent blushing and progresses with acne-like pustules and papules. Untreated, rosacea gets worse over time and can cause visible blood vessels and enlarged pores to appear on the face. Advanced rosacea may also leave scars and cause a thickening of the skin on and around your nose. In severe cases, rosacea has even been known to affect eyelids. Learn more about the stages of rosacea.

Rosacea generally occurs in people with light complexions between the ages of 20 and 50. Although more common in women, it is usually more severe in men. Because of its symptoms, rosacea can be a cause of embarrassment. Thankfully, treatment is available and can help reduce the symptoms and prevent recurrences.

Think you may have rosacea? Try the Rosacea Checklist.

Acne is a common skin disorder characterized by whiteheads, blackheads, pimples and, in some people, deep painful bumps that look and feel like boils. Acne most commonly occurs on the face but can also appear on the back, chest, shoulders and neck.

Acne is most common in puberty and teenagers but it may occur in adulthood. Treatment is important to prevent the scarring that can occur from the numerous blemishes.

Seborrheic dermatitis (SD) is a chronic, inflammatory skin condition that occurs in areas where there are large numbers of sebaceous glands, such as the scalp, eyebrows, nose creases, ears, chest, groin, armpits and gluteal (buttocks) creases. Sebaceous glands produce an oily substance called sebum to lubricate the hair and skin. In SD, excess cells are formed, causing flaking. The flaking is usually red and itchy and may be loose and dry or moist and greasy.

SD is most common in infants younger than three months of age and among adults age 30 and older. The condition is slightly more common in men than women and usually first appears in patients who are in their teens and 20s. On the scalp, it may be called "dandruff." In babies, it is known as "cradle cap."