When the size of the affected area of psoriasis is between the size of 3 to 10 palms of the patient’s hand, and the quality of life index of the dermatosis is between 6-10 points, then the degree of psoriasis disease has reached a moderate level. Psoriasis, also known as psoriasis, is a complex and easily recurring disease that usually manifests itself as scaly erythematous papules on the affected area accompanied by an itchy sensation. Psoriasis can appear on all parts of the body, but is more common on the extremities and sacrococcygeal area, and is generally more severe in winter than in summer. Psoriasis is categorized into 3 types according to the severity of the disease: mild, moderate, and severe. Mild refers to the area of skin lesions is less than the size of 3 palms, rarely affects the quality of life of patients, usually without treatment, dermatologic quality of life index in 2-5 points. Moderate refers to the lesion area between 3-10 palm size, affecting the patient’s life, the patient expects to improve the quality of life, dermatology quality of life index score of 6-10. Severe is defined as the area of skin lesions is greater than 10 palm size, greatly affecting the patient’s quality of life, and the dermatologic quality of life index is greater than 10 points. Psoriasis is generally difficult to cure, patients should maintain a sunny and optimistic mentality, more exercise, improve their own immunity, go to the hospital regularly for follow-up, in accordance with the doctor’s advice, choose the appropriate treatment to get better.