Redness of the skin after sun exposure is a symptom of sunburn, which is a chemical reaction caused by the absorption of a large amount of ultraviolet light by the proteins and nucleic acids in the skin cells after intense sun exposure. There are several ways to deal with the redness of the skin after sun exposure: 1. Immediately get out of the pathogenic environment: patients with symptoms of redness of the skin after sun exposure should promptly get out of the sun exposure environment and do a good job of sun protection; 2. Cold compresses: cold compresses can be applied with refrigerated physiological saline or mineral water for 10-20 minutes each time, which has the effect of calming the skin. After the cold compress treatment, mild patients can apply moisturizing skin care products, do not apply whitening products before recovery; 3, topical medications: common are glycolite lotion, zinc oxide lotion, etc., has a sedative and astringent effect, can relieve the symptoms of skin redness; 4, oral medications: common are antihistamines and vitamins, antihistamines have anti-allergic and anti-itching effect, such as loratadine, cetirizine Antihistamines have anti-allergic and anti-itching effects, such as loratadine and cetirizine. Vitamins can enhance the skin’s resistance to sunlight and promote skin healing. Patients should not wash their skin with soap and hot water after sunburn to avoid aggravation of the condition. At the same time, you should protect your skin from the sun by wearing long sleeves and long pants, wearing an umbrella and applying sunscreen when you go out.