The pain and itchiness of the bumps on the back of the head may be suffering from folliculitis, hair erythema. 1. Folliculitis:Due to local hair follicles are infected by bacteria, or due to cleaning is not in place, oil secretion and other reasons lead to pore clogging, resulting in an inflammatory reaction, can be applied locally clindamycin phosphate cream, mupirocin ointment, fusidic acid ointment, or oral, amoxicillin, cephalexin and other drugs treatment. 2. Hairy erythematous chaff rash: drug side effects, genetic factors, vitamin deficiency, immunity defects, etc. are the triggering factors of the disease, should be timely supplementation of the body’s lack of vitamins, and oral, cyclosporine, adalimumab and other medications. The back of the head pimples, pain and itching, it is recommended to consult a doctor in a timely manner, to clarify the cause of the symptomatic treatment.