Plaque psoriasis is the most common form of psoriasis. It is red patches on the skin with white silvery scales of dead skin. These patches often appear on the scalp, knees, elbows, back, legs, or arms.  They are sometimes itchy and painful because they crack and bleed. It is characterized by skin cells that multiply 10 times faster than normal. It can be on soles of feet, hands and torso. Continue Reading Article >