Solar dermatitis, may be solar dermatitis caused by ultraviolet sunburn, or photosensitized dermatitis caused by skin allergy to ultraviolet light. Different causes, resulting in different symptoms, treatment methods are also different, as follows: 1. solar dermatitis: patients should be sunscreen, or reduce the outing, avoid sun exposure, can be used externally with glycerite lotion to astringent and anti-itching effect, combined with oral loratadine, cetirizine and other antihistamines and ibuprofen and other non-steroidal anti-inflammatory drugs treatment. 2. Photosensitive dermatitis: this disease includes polymorphic sun rash, chronic photodermatitis. Patients should first pay attention to sunscreen, go out and strictly avoid light, can be used under the guidance of the doctor external mometasone furoate cream and other glucocorticosteroids, oral antihistamines such as loratadine, but also oral hydroxychloroquine and other antimalarials as prescribed by the doctor, and can be applied to azathioprine and other immunosuppressive drugs if necessary. If the patient in the sun after the appearance of skin lesions, with uncomfortable symptoms, should go to the regular hospital in time, clear diagnosis in the doctor’s guidance under the standardized treatment, in the process of treatment must be careful to comply with the doctor’s instructions, safe and reasonable use of medication, do not indiscriminate use of medication.