The symptoms of red and painful skin after being exposed to the sun are due to the acute damage of the sun to the skin, which is often called sunburn. First of all, you should avoid the excessive stimulation of the sun, try to avoid going out at the time of sufficient sun exposure to reduce the continuous damage to the skin by ultraviolet rays, and choose a suitable way to deal with: 1, cold compress: if the local skin is red and painful symptoms after being exposed to the sun, accompanied by a burning sensation of the skin, you can choose to rinse with cold water and use a towel wrapped in an ice pack to dissipate heat, and can use a mild make-up water to stabilize The skin can be stabilized with a mild lotion to replenish moisture and reduce the pain; 2. Boric acid solution is a weak acidic chemical that can clean the skin and has a mild bactericidal, astringent and anti-itching effect on the skin, which can reduce the symptoms of local redness and pain, achieve anti-inflammatory and anti-allergic effects, and at the same time can promote the healing of the wound to prevent continued damage; 3, skin care: after the skin is stabilized, you can use facial care solutions such as moisturizing masks or serums to take care of the skin. Do not use your hands to tear off the dead skin that has not fully grown, otherwise it may cause the skin to form dark spots or breakage, etc.; 4, drugs: If the symptoms of sunburn are more obvious and photoallergic phenomenon occurs, you can choose antihistamines, such as loratadine, levocetirizine hydrochloride, etc., under the guidance of a doctor, to relieve local redness and pain, promote the recovery of epidermal cells and avoid further aggravation of the lesions. If necessary, glucocorticoids, such as oral prednisone, or topical hydrocortisone cream, can also be used for treatment. For those with unbearable pain, drugs such as ibuprofen can be given to relieve the pain. If the skin is red and painful after sun exposure, the patient can be treated first and then observed. If the sunburned skin continues to show no improvement, or if there are accompanying symptoms or aggravation, the patient should actively go to the hospital for symptomatic treatment.