- Sep 13, 2012
Psoriasis is a noncontagious, skin disease that is caused by an overreaction of the body’s own immune system, which speeds up the growth and life cycle of skin cells. Usually, a skin cell matures and falls off the body’s surface in about 30 days. However, a psoriatic skin cell takes only three to four days to mature and move to the surface. Instead of falling off, extra skin cells build up on the skin’s surface forming “plaques” which appear red, flaky and scaly that are often itchy and painful.