Psoriasis cannot be cured, but it can be well controlled. The cause of psoriasis is unclear, and some studies have confirmed that psoriasis is also a manifestation of metabolic syndrome in patients who also suffer from hypertension, diabetes, hyperlipidemia, etc. Some are related to upper respiratory tract infections, stress, genetics, etc. Others are related to certain medications, such as b-blockers and lithium. Improper treatment or its own development can evolve into pustular psoriasis, erythrodermic psoriasis, and a special type is arthritic psoriasis. For different types of treatment are different, in general, there are the following aspects: 1. Prevention: pay attention to the combination of work and rest, enhance physical fitness, and prevent upper sensation. Relieve mental stress. Do not drink alcohol. If there is a drug factor, the drugs that can be changed as far as possible on the basis of not affecting the effect of the treatment of the original disease. 2.Unusual psoriasis can be treated with: ultraviolet radiation (NB-UVB,PUVA), starch bath or seawater bath, topical hormone preparations, vitamin D3 derivatives, vitamin A ointment, coal tar preparations, salicylic acid ointment, etc. 3.Pustular and erythrodermic psoriasis: on the basis of skin protection, ah retinoic acid or avobenzone can be taken orally. 4, arthritic psoriasis can take oral methotrexate, and topical drugs. In addition, cyclosporine or biological agents can be chosen according to the condition. Various types of psoriasis can also be treated with Chinese herbal medicine. If there are other metabolic abnormalities, they should also be treated actively, such as hypertension, hyperlipidemia and hyperglycemia.