The first step is to strengthen the drug treatment of psoriasis when the new rash appears during the period of psoriasis recession, which can be combined with the oral intake of compound aminopeptide tablets or silver granules, and the topical application of glucocorticosteroid medication, Dinocaprolactone cream or hydrocortisone acetate cream. If the patient’s rash does not show significant improvement, it can be changed to medium-acting, or strong glucocorticoid drug halometasone ointment or mometasone furoate cream application. After a period of application, to reduce the adverse effects of the hormone, the calcium-modulated phosphatase inhibitor tacrolimus ointment or pimecrolimus cream can be applied, and a vitamin D3 derivative ointment such as captopanaxol ointment or tacrolimus ointment can be chosen for replacement therapy. During the treatment period, if the rash is not red in color, it can be combined with medium-wave narrow-spectrum ultraviolet radiation.