Is a common skin disorder found mostly in people between the ages of 15 and 25 but it can occur at any stage of life and last for a long period of time. It is shown by thick patches of red skin covered by silvery scales. The name comes from the Greek word ‘psora’ to itch. This occurs when the body produces new skin cells much faster than normal, but the rate that the old skin cells shed, remains the same. Flare ups are followed by periods of healing and the person never feels like it is completely gone.