The back is sunburned very itchy, considered to belong to the sun dermatitis, can be through the general treatment, topical drugs, oral medication and other measures to regulate. 1. General treatment: keep the local skin clean and hygienic, choose loose and comfortable clothes, avoid direct sunlight again, regulate the mind, avoid mental stress. 2. Topical medication: you can use glycerine lotion, boric acid solution or hydrocortisone ointment and other medications. 3. Oral medication: severe itching can take cetirizine, ebastine and other drugs to stop itching treatment. The back is sunburned very itchy, it is recommended to go to the regular hospital in a timely manner to check, the drug needs to be used under the guidance of a professional doctor.