When a patient has a hard bump in the armpit and squeezes out a lot of pus, it is most often a case of folliculitis, a bacterial infection of the hair follicle. Although the patient has squeezed out a lot of pus, it is best to go to the dermatology department or general surgery department of a regular hospital for consultation. Because sometimes the patient has squeezed out a lot of pus, but the local inflammatory infection is not completely controlled, it is best to let the doctor give regular skin disinfection and effective local bandaging, and at the same time with anti-infective drugs for external application, oral or intravenous application. The more commonly used topical antibiotic ointments, such as erythromycin ointment, fusidic acid ointment, and mupirocin ointment, and the majority of oral medications are cephalosporins. If the patient continues to have localized pus, it is best to go to the hospital and let the doctor perform a puncture to drain the pus and not to squeeze it at home.