Itching all over the body when exposed to the sun is usually caused by solar dermatitis. The onset of solar dermatitis may be due to the skin does not have enough melanin protection, excessive alcohol consumption, the intake of photosensitive drugs or food and other factors related to the general after sun exposure, there will be skin swelling, erythema, itching and other symptoms, serious blisters, oozing and vesiculation of the skin, but also may be accompanied by fever, nausea, vomiting and other systemic symptoms. When the symptoms of solar dermatitis, we should get out of the sun-exposed environment in time, usually do a good job of sunscreen measures, you can follow the doctor’s instructions to use glycerine lotion, zinc cream and other drugs to protect the skin, and timely access to hospitals to determine the condition of the physician under the guidance of the relevant treatments, and strictly comply with the doctor’s instructions to use the medication.