Swollen gums and pain half of the face are swollen can be seen in wisdom teeth pericoronitis, apical periapical inflammation disease, corresponding to the local rinsing, drug treatment or root canal treatment. 1. Wisdom tooth pericoronitis. Wisdom teeth in the oral cavity is often an obstruction state eruption, will cause the gums around the wisdom teeth red, swollen and painful, serious cases will also cause buccal gap infection, lymph node enlargement, clinically generally use saline or hydrogen peroxide to rinse the gums around the wisdom teeth, and then iodine glycerine on the medication, to be the inflammation into a chronic phase as soon as possible after the removal of wisdom teeth. Follow the doctor’s instructions for medication. 2. Periapical inflammation. Teeth are stimulated by external temperature or due to deep caries can cause periapical inflammation, inflammation reaches the apical area of the mucous membrane, can cause localized swelling, the treatment is generally root canal therapy, the establishment of drainage channels, eliminate the inflammation of the apical area. Gum swelling and pain half of the face, it is recommended to go to the hospital in a timely manner to check the cause of the targeted treatment, to avoid affecting the oral periodontal and dental tissue health.