Psoriasis is a noncontagious critical skin condition which involves the rapid formation of skin cells. This formation of skin cells causes scaling on skin surface followed by inflammation and redness. Psoriasis is unpredictable, irritating and a type of skin disorder which is impossible to understand. In this cells beneath the skin surface multiple very fast and die, their volume causes raised, red plaques covered with white scales. The average life circle of skin cells is about a month. When a person has psoriasis, this cell production occurs in just a few days. That is why skin cells do not have time to shed off. This overproduction leads to a buildup of skin cells. Scales may develop on any part of the body including hands, feet, neck, scalp, face but especially on joints such as elbow and knees.