If you see fungal spores and hyphae under the microscope, it is considered tinea corporis caused by fungal infection. You can apply topical terbinafine hydrochloride gel or naftifine ketoconazole cream, and if the rash is very severely keratinized you can apply salicylic acid ointment or vincristine ointment mixed and applied with the treatment. If the fungal microscopy is negative, according to the shape of the rash, such as the appearance of a thicker rash, deepening of the skin furrow, accompanied by intense itching, especially severe itching at night, at this time, consider the possibility of neurodermatitis, that is, psoriasis is relatively large. You can apply topical fluticasone propionate cream 1 time/day to apply foam, and those with intense itching can take oral loratadine tablets for treatment.