Large red bumps on the back may be folliculitis or sebaceous cysts, and the cause of the disease should be clarified and then choose targeted drug therapy or surgical treatment. 1. Folliculitis: generally caused by bacterial infection, the clinical manifestation of red bumps centered on hair follicles, accompanied by itching and pain. Patients can use antibacterial cream to smear the affected area, such as erythromycin ointment, mupirocin ointment, serious condition can be oral antibiotics at the same time, such as cefadroxil, fluconazole. 2. Sebaceous cysts: generally caused by hair follicles sebaceous gland mouth blockage, often manifested as a smooth surface round red pimples, generally without treatment, if the cyst suddenly increased or the patient consciously affect the aesthetic impact, can be removed through surgery. Patients with red bumps on the back, should consult a doctor in a timely manner, after clarifying the cause of the disease, standardized treatment under the guidance of the doctor, the use of drugs need to follow the doctor’s instructions, so as not to delay the condition.