The case of small pimples on the back does not necessarily belong to acne, and does not rule out that it is due to eczema, folliculitis, prickly heat and other factors, which can be relieved by physical methods, medication and other ways. 1. Eczema: the case of small pimples on the back, may be a variety of internal and external factors caused by eczema, at this time can be applied externally with Dinaid cream, oral loratadine, cetirizine and other antihistamine treatment. 2. Folliculitis: this is an inflammatory skin disease mainly caused by hair follicle infection, manifested as red papules centered on hair follicles, accompanied by itchy and painful symptoms, and can be treated with fusidic acid and mupirocin ointment for anti-infection. 3. prickly heat: usually occurs in the hot summer, mainly due to small sweat glands duct obstruction caused by the general need for treatment, timely out of the hot environment can be, if necessary, can be coated with glycerin lotion. Back long small acne symptoms, need to cooperate with the doctor as soon as possible to clarify the specific causes, and then do targeted treatment, do not blindly use drugs, so as not to produce adverse effects.