Swollen gums and pus can be drained by incision. In general, if the gingival sulcus is volatile, the swollen part can be cut open with a surgical blade and the pus can be drained; and peroxide and saline can be used alternately for rinsing to promote pus drainage and disinfection; then local medications such as iodine glycerin or minocycline hydrochloride can be applied to promote healing. Oral or intravenous anti-inflammatory treatment is also recommended. Commonly used drugs include cephalosporin plus metronidazole tablets or erythromycin, and amoxicillin, etc.; while intravenous injection of cephalosporin plus ornidazole sodium chloride injection or tinidazole injection can be used. It is also recommended to check whether there is calculus around the gums. If the abscess is caused by calculus stimulating the gums, periodontal treatment can be performed after the abscess subsides; if the abscess is caused by inflammation of the root tip, root canal treatment can be performed.