Psoriasis is a kind of immune-mediated chronic, recurrent, inflammatory and systemic disease induced by the combined effects of heredity and environment, which generally cannot be completely recovered but only alleviated, and the time of getting better varies according to the different subtypes of psoriasis. 1. Acute punctate psoriasis: also known as rash-type psoriasis, commonly found in young people, often with a history of streptococcal infection in the throat before the onset of the disease. The onset of the disease is rapid, and the whole body can be affected in a few days. The skin lesions are small papules and macules with reddish color, covered with a few scales, and the degree of itching varies. The itchiness varies in degree. It can subside within a few weeks after appropriate treatment, and a few patients can be transformed into chronic disease. 2. Arthropathic psoriasis: besides skin lesions, arthropathy can appear, the latter and skin lesions can appear at the same time or successively, and any joints can be involved. It can be characterized by joint swelling and pain, activity limitation, and joint deformity in severe cases with progressive development, which requires early treatment to control the symptoms and prevent disability. 3. Erythrodermic psoriasis: It is characterized by diffuse redness, infiltration and swelling of the skin with a lot of furfuraceous scales, which may be accompanied by flaky normal skin, and systemic symptoms such as fever and enlarged superficial lymph nodes. The course of the disease is long and prone to recurrence. Psoriasis generally can not be completely recovered, but can only alleviate the condition. When you find psoriasis, you should consult a doctor in time, and actively treat it under the guidance of a professional doctor in order to maximize the quality of life.