Psoriasis is a chronic inflammatory skin disease that poses health risks mainly to appearance and socialization, and generally does not affect internal organs. It is also not contagious. However, severe psoriasis (skin damage exceeding 10% of the body surface area) that is poorly controlled over a long period of time carries the following health risks: 1. susceptibility to heart disease and hypertension; 2. increased chance of developing diabetes; 3. susceptibility to chronic lung disease; 4. susceptibility to kidney disease; 5. susceptibility to smoking and alcohol abuse; 6. susceptibility to depression; and 7. increased adverse reactions caused by treatment medications. Those who suffer from psoriasis should pay attention to the above aspects of examination and treatment. Because the cause of the disease is not fully understood, the academic community currently believes that psoriasis is not yet curable. However, this does not mean that psoriasis is incurable, and about half of the patients can have long-term remission after treatment.