The effective time for acne, chronic eczema and dermatitis is usually about half a month, psoriasis takes about 1 month, and the course of treatment varies from 2 to 3 months. The course of treatment for chronic urticaria and hormone dependent dermatitis generally takes 3 to 6 months, and consolidation of maintenance treatment is the key. Vitiligo shows effect generally takes 2 or 3 months, and some take 6 months. Connective tissue diseases including dermatomyositis, lupus erythematosus, and scleroderma require year-round maintenance and consolidation therapy, and some patients are on medication for life.