Psoriasis is a chronic inflammatory recurrent skin disease characterized by erythematous skin covered with white scales; commonly known as “psoriasis”. Psoriasis tends to develop or worsen in the fall and winter months, while long-term illnesses may have no seasonal pattern. The exact cause of psoriasis is not known. At present, it is believed that psoriasis is a polygenic genetic disease in which genetic factors and environmental factors act together, and malfunction of immune activated cells is the main pathogenesis. According to the long-term research of domestic and foreign scholars and the Department of Dermatology of Ruijin Hospital, the triggers or aggravating factors of psoriasis include infection, cold, exertion, mental factors, trauma, dry skin and drugs. According to the clinical characteristics of psoriasis, it can be divided into common type, arthritic type, pustular type and erythrodermic type, etc. Patients with psoriasis should pay attention in life and treatment: 1, the disease is not contagious and not incurable, mental tension, emotional depression, etc. will aggravate the disease. 2, do not believe in any advertising, especially mail-order drugs, the efficacy is short-lived, the consequences may make the light aggravate the disease, the serious life-threatening. 3, careful search for individual factors that aggravate the disease. For example, food, some patients aggravated after eating dog or mutton, some aggravated after eating fish, shrimp and other aquatic products, some aggravated after drinking alcohol, personal experience is very important, try to avoid individual factors that may aggravate the disease. However, do not be too much “taboo”. 4, under the guidance of a physician to adhere to the treatment of the skin, such as narrow-wave ultraviolet radiation and topical drugs, rubbing should be massaged several times to help the absorption of drugs. As far as possible, do not use internal drugs. 5.Do not scratch when itching; choose soft, cotton clothing. 6, more baths, after the bath to use a moisturizer with skin barrier protection function. According to the continuous observation of psoriasis patients for more than 3 years in the dermatology department of SEGi Tan Hospital, patients who insisted on using moisturizers topically from autumn to the following summer had a lower relapse rate and a lower severity of disease when relapsing. 7.If there are infected lesions such as recurrent tonsillitis, tooth and gum or alveolar infection, etc., consult a dermatologist in time. 8, pay attention to keep warm, regular life, avoid strain. Several studies have concluded that smoking can aggravate psoriasis. 9, the emergence of joint symptoms should be consulted as soon as possible, because “psoriatic arthritis” is more teratogenic than rheumatoid arthritis and ankylosing spondylitis.