Toothache swollen half of the face is more serious, may be wisdom teeth pericoronitis, apical periodontitis and other diseases. 1. Wisdom tooth pericoronitis: common in young people, patients due to soft tissue inflammation caused by long wisdom teeth, there will be a restriction in opening the mouth, swollen gums, severe pain and other clinical manifestations, severe cases may appear on the affected side of the face is swollen. Patients are advised to eat a light diet, maintain oral hygiene, and go to the dentist for treatment, and may need to remove the wisdom teeth after the inflammation is controlled. 2. Periapical periodontitis: Inflammation of the tissues next to the root tip of the tooth. If pus develops, the pus will flow down the cavity to the biting muscle position, leading to infection and thus facial swelling. Clinically, incision and drainage, oral antibiotic treatment such as penicillin, etc., need to do root canal treatment to completely remove the source of infection. Toothache swollen half of the face of the patient is recommended to seek medical treatment as soon as possible, actively cooperate with the doctor’s treatment, timely treatment of the affected tooth, to avoid serious consequences, the use of drugs need to follow the doctor’s instructions.