Boils are caused by inflammation of the hair follicle and its surroundings, where small holes appear in the infected tissue after pus and bleeding, due to the expulsion of necrotic tissue. Hair follicle and peripheral inflammation is caused by infection of hair follicle and peripheral tissues, and after a large number of bacterial growth, localized suppurative reaction occurs, and accompanied by necrosis of peripheral tissues of the hair follicle, pus and necrotic tissues are discharged, and cavities appear, and some of them can be healed by themselves after the pus is completely discharged. Pus bleeding small cavity formation, is an acute follicular and peripheral infectious lesions of a recovery process, during this period to pay attention to personal hygiene, to ensure that the skin is dry. If the persistence does not improve, need to do local drainage under the guidance of the clinician, avoid to squeeze yourself, to prevent infection aggravation, and can be used externally mupirocin ointment, take amoxicillin and other treatment. Hair follicles and the surrounding inflammation pus bleeding after the cavity continues to increase, the symptoms of infection aggravation, the need for timely medical treatment, standardized treatment under the guidance of clinicians, drugs should be applied under the guidance of a doctor.