Psoriasis, commonly known as psoriasis, is a polygenic, chronic inflammatory skin disease with a global prevalence of about 2%, according to statistics. If one parent has psoriasis, the probability of the child having the disease ranges from 20% to 25%. It is generally believed that psoriasis is caused by a combination of genetic problems or environmental factors such as psychological stress and trauma, and is also associated with the body’s immune system. Psoriasis cannot be cured, and prevention of psoriasis recurrence must be guarded against. 1, prevention of infection: local foci of infection is the main cause of psoriasis, especially after the cold, complications of tonsillitis, bronchitis, must be actively treated to shorten the course of the disease. 2, allergic factors: due to diet or taking drugs, or contact with a substance and allergic, can often induce the occurrence of psoriasis, resulting in red, itchy skin, followed by psoriasis lesions affected. 3, damp and cold: the number of wind and cold invasion and induced psoriasis is more, because the living environment is humid, cold, can make the disease occur or aggravate, so patients should try to avoid large hot and cold stimulation of the skin, indoor should keep ventilation, dry, warm. 4, mental factors: overwork, family accidents, economic problems, etc., so that patients are overly nervous, emotional depression, resulting in endocrine disorders, immune function decline, can induce the occurrence of psoriasis. 5, must avoid smoking, alcohol abuse, try to reduce stress, while ensuring a balanced diet and adequate sleep, otherwise the disease may relapse. 6, usually can moisturize the skin more, apply skin cream, avoid scratching or rubbing the skin in the wound. 7, more seawater bathing as well as sunbathing.