Itching and redness of the skin should be considered to be caused by skin allergy. First of all, the patient should be asked in detail about the cause of the onset, and try to be able to find the cause in order to get rid of it; oral medication, oral antihistamines can be taken, such as oral loratadine tablets, levocetirizine hydrochloride tablets, compound glycopyrrolate tablets, etc. For local treatment, the itchy area can be treated with topical dehumidification and antipruritic ointment, mometasone furoate ointment, fluticasone propionate cream, etc.; for Chinese herbal medicine treatment, you can take skin itch granules and moistening and anti-pruritic capsules orally; you can also do needle test to find allergens and then desensitization treatment, and do not eat fish, shrimp, seafood and spicy food.