We are pleased to welcome and inform you of a National Organization totally dedicated to those who have psoriasis and psoriatic arthritis. Psoriasis Network Support is a registered, charitable organization, and has a National Board of Directors. Psoriasis is a common and chronic skin disease. A person with psoriasis generally has patches of raised red skin with thick silvery scales. The affected skin may be red and scaly or have pustules, depending on the type of psoriasis the individual has. Psoriasis is usually found on the arms, legs, trunk, nails, or scalp, but psoriasis may be found on any part of the skin. The most commonly affected areas are the knees and elbows.