In order to reduce the health risks of wisdom teeth, I would like to introduce you to the knowledge of pericoronitis of wisdom teeth. Wisdom tooth pericoronitis: Wisdom tooth pericoronitis refers to the inflammation of the soft tissue around the crown of the wisdom tooth (third molar) when the eruption is incomplete or obstructed. It occurs mostly in young people aged 18 to 25 years old during the eruption of wisdom teeth, and is one of the common diseases in oral and maxillofacial surgery clinics. The clinical manifestations of pericoronitis: the soft tissues around the wisdom teeth and gums are mainly congested, swollen, erosion or pus overflowing from the blind pockets, and there can also be various degrees of systemic symptoms such as chills and fever. Treatment of peri-coronitis is mainly local treatment in the acute stage, supplemented by systemic supportive therapy. After the inflammation is controlled, wisdom teeth that are not likely to erupt orthotropically should be extracted as soon as possible. The wisdom tooth pericoronitis prevention: 1, careful brushing and diligent mouth rinsing to maintain oral cleanliness to prevent inflammation. 2.Empty wisdom teeth as early as possible to prevent pericoronitis and adjacent tooth decay. Treatment of pericoronitis of wisdom tooth: 1.Local rinsing. Commonly used saline, 1% ~ 3% hydrogen peroxide solution, repeatedly rinse the gingival pocket, until the overflow liquid is clear. Dry the local area, dip the probe into the gingival pocket with iodine glycerin, 1～3 times a day, and rinse the mouth with warm water and other rinsing agents. 2.Antibacterial drug treatment. According to the degree of local inflammation and systemic reaction and the presence of other complications, choose antibacterial drugs and systemic supportive therapy. 3.Excision and drainage. If an abscess is formed near the gingival flap, it should be incised and drainage strips should be placed in time. 4.Pericoronal gingival flap excision. When the acute inflammation subsides, the wisdom tooth with sufficient eruption position and normal tooth position can be removed under local anesthesia to eliminate the blind pocket. 5, mandibular wisdom tooth extraction. If the mandibular wisdom tooth is not in proper position, if there is no sufficient eruption position, if the relative maxillary third molar is not in proper position or has been extracted, and to avoid recurrence of pericoronitis, it should be extracted as early as possible. In cases with buccal fistula, the fistula should be removed at the same time as the extraction, the granulation should be scraped out, and the facial skin fistula should be sutured.