Wisdom tooth gums are swollen and painful but wisdom tooth pericoronitis, you can take nitroimidazole antibacterial drugs, such as metronidazole, tinidazole, etc., combined with local irrigation and incision and drainage, as follows. 1. When the wisdom tooth obstruction or eruption is incomplete, it can cover the gingival flap, forming a blind pocket, bacteria and food are easy to accumulate in the blind pocket, when the systemic resistance is reduced, the local bacterial virulence is enhanced, it can cause an acute attack of wisdom tooth pericoronitis. Nitroimidazole antibacterial drugs, such as metronidazole, tinidazole, etc., can be taken to reduce inflammation. 2. Drugs generally can not completely eliminate wisdom teeth pericoronitis, need to be combined with local rinsing, that is, the use of saline repeatedly rinse the gingival pocket, to the overflow of liquid clear, local drying, iodine glycerin can be placed in the gingival pocket. If an abscess is formed, it should be incised and drained promptly. Drugs should be used under the guidance of a doctor, and it is recommended to go to the hospital in time to receive early professional treatment.