On the skin it causes plaques of red, raised, scaly skin typically on the elbows, knees, scalp. Psoriasis can affect large areas of the skin, and last for long periods as the result of an accumulation of dead skin cells that appear as thick, silvery scales. It is itchy, dry and inflamed skin. Plaques are commonly found on the arms, legs, scalp, trunk, buttocks and other areas. Symptoms can remit and return or flare up caused by triggers.

However, clinical symptoms alone do not account for the devastation of psoriasis on a person’s quality of life, particularly when a child is affected. A common source of embarrassment is the belief that psoriasis is contagious which can cause emotional distress and social avoidance. Physical limitations such as cracking skin on the hands and feet can interfere with the activities of daily life, the ability to play sports and work.