There are five main types of psoriasis:
It is most common type of Psoriasis. About 80-85% of people with Psoriasis have this type.
Plaque psoriasis typically appears as raised areas of inflamed skin covered with silvery-white scaly skin. These areas are called plaques and are most commonly found on the elbows, knees, scalp, and back. It may be accompanied by severe itching, swelling, and pain. It affects all body sites, including the face, hands, feet, nails, trunk, and extremities.
Plaque psoriasis can be fatal as the extreme inflammation and exfoliation disrupt the body's ability to regulate temperature and perform barrier functions.
Pustular psoriasis is an uncommon form of psoriasis.
Pustular psoriasis appears as clearly defined, raised bumps that are filled with a white, thick fluid composed of white blood cells. This purulent exudate is commonly called pus. The skin under and around these bumps is red.
Von Zumbusch can appear abruptly on the skin. It is characterized by widespread areas of reddened skin, which become painful and tender.
Within hours, the pustules appear. In next 24 to 48 hours the pustules dry, leaving the skin with a glazed and smooth appearance. Von Zumbusch is associated with fever, chills, severe itching, dehydration, a rapid pulse rate, exhaustion, anemia, weight loss and muscle weakness.
Acropustulosis (acrodermatitis continua of Hallopeau) is a rare type of psoriasis characterized by skin lesions on the ends of the fingers and sometimes on the toes. The eruption occasionally starts after an injury to the skin or infection. The lesions can be painful and disabling, and cause deformity of the nails. Occasionally bone changes occur in severe cases.