The pimples on the waist consider the waist eczema or shingles. 1. lumbar eczema: lumbar by trouser belt, trouser edge and other items of friction, allergic reaction, or sweat breeding bacteria produce inflammation reaction, there will be flaky small rash and accompanied by itchy symptoms, need to keep the lumbar skin dry, can be applied fusidic acid cream anti-infective, mometasone cream anti-inflammatory and so on to alleviate the symptoms. 2. Herpes zoster: due to low immunity or physical and mental stress and other factors, resulting in infection with the herpes zoster virus, the skin on the waist will grow into flaky pimples or erythema, blisters, need to pay attention to a regular diet, avoid staying up too late, and if necessary, can be taken orally acyclovir treatment. The cause of a lot of pimples on the waist of many reasons, it is recommended to dermatology, improve the examination to clarify the cause of the disease, standardized treatment under the guidance of the doctor, comply with the doctor’s instructions to use drugs, do not self-medication.