The cause of psoriasis is unknown and the mechanism is complex, so there is no good way to prevent it. But what should we pay attention to when we have psoriasis? 1, to pay attention to avoid infection. Many patients have rashes after upper respiratory tract infections, therefore, and avoid infection to clear infectious lesions, so clinically, we have given anti-infection treatment to the first cases or relapsers who have recent infections. However, it is best to prevent the occurrence of infection at an early stage. 2, psoriasis people, especially patients in the acute stage do not drink alcohol and eat too spicy food, avoid long sun exposure, reduce the stimulation of drugs, prevent drugs that induce and aggravate psoriasis, such as lithium salts, antimalarial drugs, angiotensin converting enzyme inhibitors, etc. 3, psoriasis is generally divided into four types, of which psoriasis of the common type is generally not oral or intravenous use of glucocorticoid preparations, except in special cases; prevent avoid overtreatment. 4, psoriasis is a disease related to psychological and spiritual factors, clinical treatment at the same time should pay attention to eliminate the patient’s mental trauma, it is recommended that patients live a regular life, can be appropriate travel relaxation, to have confidence. Clinical investigation has such a situation that psoriasis patients with heavy mental burden have poorer clinical treatment effect than psoriasis patients with light mental burden.