Itchy from the sun may be caused by photosensitive dermatitis, solar dermatitis, etc., which can be treated by general therapy and medication. 1. photosensitive dermatitis: mainly due to the stimulation of ultraviolet light in the sun, the body’s allergic reaction, the intake of photosensitive substances, need to avoid contact with photosensitive substances, pay attention to avoiding the light, and do a good job of daily sunscreen work, but also through medication, commonly used drugs are nicotinamide, loratadine, cetirizine, dexamethasone, prednisolone and so on. 2. Solar dermatitis: acute phototoxic reaction occurring in the sun-exposed skin after strong sunlight irradiation, itching. Patients need to go out and do a good job of sunscreen, drug therapy can be used externally with glycerite lotion or glucocorticosteroids, severe cases of boric acid solution can be used as a wet compress. Systemic symptoms can be oral antihistamines such as loratadine, vitamin C, etc., serious cases can be systematic application of glucocorticoids. Patients with severe symptoms, it is recommended to go to the hospital in time, under the diagnosis of the doctor, according to the patient’s condition, targeted treatment.