Psoriasis Health Center

Psoriasis

Psoriasis is a chronic skin disease of scaling and inflammation that affects greater than 3 percent of the United States population, or more than 5 million adults. Although the disease occurs in all age groups, it primarily affects adults. It appears about equally in males and females.

Psoriasis occurs when skin cells quickly rise from their origin below the surface of the skin and pile up on the surface before they have a chance to mature. Usually this movement (also called turnover) takes about a month, but in psoriasis it may occur in...