After 2 hours of ultraviolet light exposure to redness and swelling of the skin, it is necessary to first avoid sun exposure, and then general treatment, medication, etc., depending on the specific condition of the skin. Prolonged exposure to ultraviolet light can cause sunburn, which in turn leads to redness and swelling of the skin, and ulcers in severe patients, and it is recommended that treatment be carried out according to the degree of sunburn. Treatment is based on early local topical medication, with the principle of anti-inflammatory, soothing and pain relief. Generally can be used topical glycerite lotion or glucocorticosteroids, such as mometasone furoate cream. In severe cases, 3% boric acid solution can be used as a wet compress. Those with systemic symptoms can take antihistamines such as loratadine and vitamin C orally, and glucocorticoids can be applied systematically in severe cases. When you go out, you should pay attention to sun protection, and you can also use sun hats, umbrellas and so on to prevent the skin from being sunburned. The use of drugs should be standardized under the guidance of a doctor.