Psoriasis is a common, chronic inflammatory skin disease of unknown origin that is characterized by excessive epidermal cell proliferation and is prone to recurrent attacks. The cause of psoriasis is complex, and the cause is not yet clear. Psoriasis is not a contagious disease, but it often causes great physical and psychological pain and economic burden to patients because of the skin problems they experience with psoriasis. The disease is not contagious, even in severe cases; 2. Treatment must be accompanied by relieving the patient’s mind of concerns and avoiding possible triggers, such as colds and tonsillitis; 3. Appropriate treatment of psoriasis can lead to a recent clinical cure, but the patient may relapse; 4. Avoid irritating foods and stimulating therapies, such as scratching and hot water washing; 5. Prevent malnutrition.