Patients with swollen flesh next to the wisdom tooth and painful swallowing usually have pericoronitis and are in the acute phase of the disease. It is usually caused by an obstructed third molar and may manifest itself as swelling and pain in the posterior region of the molar, which may worsen when chewing or swallowing, and should be treated accordingly. If infection is present, the first step is to rinse the blind peri-coronal pockets with hydrogen peroxide and saline in sequence to help reduce inflammation and analgesia. Next, the abscess or gingival flap should be incised, drained, and treated with antibiotics such as penicillin and cephalosporins to help prevent infection. If the patient is diagnosed with an obstructed wisdom tooth after the corresponding examination and it is unable to erupt, it should be extracted as soon as possible after it has been transferred to the chronic stage to avoid the recurrence of infection. If a patient develops fever or bleeding during the recovery period, he or she should be seen in the hospital and treated aggressively. In addition, these patients need to take rest and eat a light, soft food such as porridge, soft noodles, egg custard and other foods. It is also necessary to avoid smoking and alcohol, and to avoid spicy and irritating foods such as nuts, chili, fried foods, hot pot, pepper, etc., which can cause irritation to the wound and are not conducive to recovery.