The skin is always allergic, should avoid contact with allergenic substances, through the topical medicine, oral medication and other measures to improve. 1. Avoid contact with sensitizers: if your skin is always allergic, you need to check what substances you are allergic to and avoid contact with them after you have identified the allergens. 2. Topical medication: Glycolite lotion and glucocorticoid ointment (compound dexamethasone ointment, compound flumethasone ointment, etc.) can be used externally to treat the skin allergy with astringent, itch-relieving and anti-allergic effects. 3. Oral medication: generally choose antihistamines (loratadine, chlorpheniramine maleate) to relieve itching, anti-allergy, when the condition is serious, the systematic use of glucocorticosteroid drugs (prednisone tablets, dexamethasone tablets) treatment. The skin is always allergic, it is recommended to go to the hospital in time for examination, and follow the doctor’s instructions to use medication.