Prickly heat on the back is very itchy, you can use topical antipruritic agent to relieve, and in serious cases, you can use glucocorticosteroids and other drugs for treatment. If you have prickly heat on your back, you need to pay attention to keep your back clean and dry, change your clothes often, and avoid being in a too hot environment. If prickly heat is severe, you can use prickly heat powder or glycerin lotion to relieve it. If the symptoms of prickly heat on the back are more serious, topical glucocorticosteroids can also be used for treatment, including hydrocortisone cream and dexamethasone ointment. If the symptoms of prickly heat on the back are serious, you should go to the hospital in time for examination and use the above medications as prescribed by your doctor.