Psoriasis, also called psoriasis, is a very common erythematous scaling disease in dermatology. There are very many drugs for the treatment of psoriasis. For topical drugs: 1. Hormones are preferred, such as the commonly used halometasone, compound flumethasone, denuded, and mometasone furoate; 2. Vitamin D3 derivatives, commonly used are carbotriol, tacalcitol, and when necessary, there are carbotriol which is a combination of vitamin D3 derivatives and glucocorticoids, such as carbotriol betamethasone ointment. For oral drugs, there are mainly some immunosuppressive drugs, such as cyclophosphamide, methotrexate, cyclosporine, and tretinoin, etc.; now there are also some biological agents. In addition to these oral and topical medications, physical therapy, such as narrow-wave ultraviolet light, 308 excimer light or excimer laser, and Chinese herbal medicine are now very effective in the treatment of psoriasis.