The skin turns red after a day in the sun, usually due to UV phototoxic reaction, is generally not very serious, the patient can recover by the following ways: 1, wet compress: you can use a towel soaked in cold water or wrapped in ice for wet compresses to relieve the symptoms of red skin. After wet compresses need to use appropriate moisturizing products to avoid dry, flaky skin; 2, topical medications: such as glycolite lotion, zinc oxide ointment, boric acid solution, etc., with the role of protecting the skin as well as heat relief itch; 3, oral medications: common vitamins and antihistamines. Antihistamines have an anti-allergic effect and are suitable for patients with red skin and local itching after sunburn, such as loratadine and cetirizine. Patients can apply sunscreen, wear long-sleeved shirts and sun hats when going out to prevent sunburn from reappearing. Also strengthen skin nutrition, eat more vitamin-rich vegetables and fruits, and pay attention to reduce the intake of photosensitive foods, such as amaranth, celery, spinach, parsley, etc.