Many small bags on the body and hands and itchy may be contact dermatitis, mite dermatitis, sweat herpes and other causes. It can be improved by oral medication, topical medication, killing mites and other methods under the guidance of a doctor. 1. Contact dermatitis: you can take antihistamines under the guidance of a doctor, such as cetirizine, loratadine and so on. You can also use anti-inflammatory ointment to relieve itching, such as compound dexamethasone ointment, hydrocortisone cream and so on. 2. Mite dermatitis: first of all, we should put close clothing, bedding, bed sheets, etc., for ironing and drying to kill mites. At the same time in the doctor’s guidance to use oral as well as topical drugs comprehensive treatment, such as oral loratadine and topical glycerine lotion. 3. Sweat herpes: you can use topical ointment under the guidance of a doctor, such as tretinoin urea ointment, zinc oxide ointment, and so on. You can also take oral medication to relieve itching, such as loratadine. Patients with many small bags on the body and hands that are still itchy should pay attention to keeping the skin clean and avoid scratching. Use drugs under the guidance of a professional doctor, do not blindly use drugs, so as not to delay the condition.