Intractable dermatophytosis mostly refers to ringworm, but because psoriasis also has ringworm-like manifestations, it is necessary to clarify the specific disease and then use the appropriate drugs, such as glucocorticosteroids, antifungal drugs, etc., to target the treatment. 1. Tinea corporis: this disease can be treated with antifungal drugs, such as miconazole nitrate cream, ketoconazole ointment, Butenafine cream, etc.; lesions of larger size, more serious condition, can be treated with oral antifungal drugs, such as terbinafine, itraconazole and so on. 2. Psoriasis: also known as psoriasis, this disease can be treated with topical glucocorticosteroids, such as dinexed cream, hydrocortisone cream, etc.; Vitamin D3 derivatives, such as carbotriol. It is recommended that patients go to a regular hospital, diagnose the specific disease, under the guidance of the doctor’s reasonable use of medication, not blindly self-medication.