Skin redness after sunburn can generally be treated with physical cooling, topical medications, and oral medications. Redness of the skin after sunburn is generally stimulated by ultraviolet light or strong visible light, resulting in acute phototoxic reaction of the skin, mostly in the summer or in areas with strong sunlight exposure. 1. Physical cooling: redness of the skin after sunburn can be reduced by rinsing with cold water or briefly applying ice packs to lower the epidermal temperature and reduce the degree of local inflammation. 2. Topical medication: By applying drugs with astringent effect, such as glycerite lotion, you can reduce the redness of the skin edema and inflammatory reaction. Or topical glucocorticosteroid drugs such as dieldrin ointment, compound indomethacin tincture and other drugs, to promote the local inflammation subside. 3. Oral medication: oral antihistamines such as cetirizine can be taken when itching is significant, and when the condition is serious, glucocorticoid drugs such as prednisone should be used systematically. Skin after sun exposure if the symptoms are serious, should go to the hospital in time to avoid delaying the condition, the specific use of drugs need to follow the doctor’s instructions.