After the face is exposed to the sun, if the symptoms are not serious can automatically recover, if the symptoms are serious or not timely out of the sunburn environment, will not automatically recover. 1. face by the sun after exposure to the face of the skin will appear red, allergies, etc., the patient if the timely detachment from the sun-exposed environment, and their own immunity is strong, the degree of damage is relatively light, then with the passage of time the symptoms of redness in the face will gradually disappear, and this time will take about 10 to 15 days or so. 2. If the patient did not get out of the sun exposure environment in time, the local skin is strongly stimulated by ultraviolet rays, there may be skin ulceration, erosion and other symptoms, which generally can not be automatically recovered, the need for symptomatic treatment. If the patient’s face after sun exposure skin redness symptoms are serious, or symptoms continue for several days without improvement, should be timely to the hospital treatment, under the guidance of the doctor to use drugs.