UV allergy that is red and itchy is considered to be photosensitive dermatitis. It is recommended to first do a good job of sun protection, such as wearing a long-sleeved jacket or sunscreen, wearing a hat, applying sunscreen, etc. Also, avoid scratching the allergic parts and aggravating the skin lesions. In addition, some diuretics, non-steroidal anti-inflammatory drugs, tetracycline, sulfonamides, etc. can also cause photosensitive dermatitis, and should be promptly consulted, under the guidance of the doctor to control the amount of medication, and medication. 1, liquid: use compounded stove glycol lotion, boric acid solution, indomethacin solution and other drugs wet compresses or wipe the local red itchy skin, which helps to relieve the redness and itching, while playing a moisturizing skin, to promote the repair of The purpose. Chinese herbal medicine such as Phellodendron Bark and Phellodendron Bark can also help to clear heat and detoxify the skin, reduce swelling and heal sores, and can be boiled in water and applied cold to the skin lesions locally; 2, ointments: glucocorticoid ointments often help to relieve itching, redness and swelling of the skin after allergy, commonly used compound dexamethasone acetate cream, mometasone furoate cream, hydrocortisone butyrate cream, dinaide cream, etc., and urea vitamin E cream, aloe vera gel, zinc oxide ointment, etc. also help to Moisturizing and anti-itching, can be used under the guidance of a doctor; 3, tablets: hydroxychloroquine sulfate tablets help to improve skin redness and reduce inflammatory reactions, cetirizine, loratadine, epastine, chlorpheniramine maleate, diphenylcycloheptadine and other antihistamines, often have a better effect on allergy-induced skin itching, redness and other symptoms of relief. In addition, it is recommended to reduce the intake of photosensitive foods, such as amaranth, fennel, capers, spinach, etc., as well as spicy and stimulating foods that contain more preservatives and additives. Care should be taken to keep the local skin clean, avoid cleaning the skin with overly hot water or alkaline detergents and soaps, use weak acid and mild cleaning products and wipe the skin with soft towels to reduce skin damage.