What is psoriasis? Psoriasis is an immune dysregulation disease. The worldwide prevalence rate of psoriasis is around 2-4%; the prevalence is 2.35% in Taiwan. Among psoriasis patients, 30% have moderate to severe disease, and almost half of them develop scalp lesions. What Is The Main Cause Of Psoriasis? Hereditary + acquired events Psoriasis may breakout at a certain point in life due to: Hereditary ( Genetics ) Injuries Burns Infections Certain drugs Stress Smoking habit Obesity Therefore, in addition to medical treatment, lifestyle modification is very important as well. Psoriasis can generally be subdivided into five categories Plaque-type (80-90%) Guttate-type…