Back acne with sulfur soap can play a certain role, but only as an auxiliary treatment. Because sulfur soap has sterilization and anti-inflammatory effect, used to wash the back can be removed to a certain extent the back of the skin oil, which can play a role in reducing oil secretion, alleviate the symptoms of acne. But sulfur soap contains sulfide content is relatively low, and sulfur soap inside the soap base can be too much to remove the skin sebum, thus destroying the normal skin barrier, which leads to dry skin, itching and other uncomfortable symptoms. So when the back of the acne, under the guidance of the doctor, the use of retinoic acid drugs such as 0.1% adapalene gel, tazarotene and so on for topical treatment, but also with oral isotretinoin for treatment. Therefore, once acne appears, pay attention to timely consultation and treatment in the hospital, to avoid blindly using drugs and delaying the condition.