Inflammatory lesions in the soft tissues surrounding wisdom teeth that are erupting or blocked are called pericoronitis. The age of onset of this disease is 18-35 years. The eruption of the mandibular wisdom teeth is not sufficiently positioned in the mandible, resulting in the eruption of the wisdom teeth being blocked, and the formation of blind pockets between the partially erupted wisdom teeth and the surrounding tooth sordid discriminatory, which can embed food and bacteria, often triggering acute pericoronitis in the presence of colds, fatigue, and other general body resistance. It is rare to see pericoronitis in maxillary wisdom teeth. The first phase of the affected side of the molar posterior area has swelling discomfort, followed by pain, chewing and swallowing aggravated, early mostly dull pain. When the infection affects the masticatory muscle fascia, mouth opening may be limited, or the face (mainly the cheek, submandibular area, parotid bite area) may be swollen. When the local infection is aggravated, fever and malaise may occur. Headache and other systemic symptoms. 2, intraoral examination can be seen obstructed wisdom teeth, surrounding soft tissue congestion, edema, erosion, tenderness, and food residue or purulent exudate in the blind pocket. In some cases, the abscess can be located on the buccal side of the second molar or in the buccal area because the infection spreads downward along the mandible. The lymph nodes under the affected side are enlarged and painful to the touch. Treatment 1. Local treatment (1) Blind bag irrigation; 3% hydrogen peroxide, 1% Ravnol, after irrigation, put iodoglycerin or concentrated Taiwan solution in the blind bag. Blind bag rinse and drug on the local inflammation is very important, there are conditions should be once a day. (2) Mouthwash gargle: such as Dobell’s solution, you can also use light saline gargle. (3) For facial swelling, external application of Ruyi Jinhuang San can be used. (4) If abscess has formed, incision and drainage should be performed, and the incision should be parallel to the gum and reach the bone surface. (5) Acute extraction: When the patient’s general condition is good and the inflammation is more limited, if it is estimated that the surgery is not too difficult, the affected tooth can be considered for extraction. (2) Systemic treatment: Oral antimicrobial agents such as booster joint levosulfur tablets, tetracycline and erythromycin can be used in less severe cases, and intramuscular injection or intravenous drip penicillin and streptomycin can be chosen in more severe cases. 3. If there is enough clearance in the jaw bone, wisdom teeth orthotropically without bone blockage and cases with fetal relationship, gingivectomy can be considered to preserve the teeth, otherwise, they should be extracted as early as possible. Prevention and conditioning Early treatment or extraction of the diseased tooth can be more effective in preventing the spread of inflammation to the adjacent tissues. Initially, the symptoms are only mild and treatment can be delayed due to neglect of its severity, resulting in rapid development of inflammation and serious consequences, thus you will suffer a lot of pain that could have been avoided. This is why early diagnosis and timely treatment is so important. When you have wisdom tooth pericoronitis you must go to a specialist hospital in time for disposal, the doctor will give symptomatic treatment for your specific situation, in addition to local treatment, according to the degree of inflammation, you should choose oral or intravenous drip antibiotics, but under the guidance of the doctor to take. In order to prevent recurrence of pericoronitis in wisdom teeth, after the inflammation is eliminated, the wisdom teeth should be extracted as soon as possible when they are found to have no eruption or orthodontic eruption possibility after examination.