Toothache causes half of the facial swelling, may be due to wisdom teeth pericoronitis, periapicalitis, etc., as follows: 1, wisdom teeth pericoronitis: often due to the patient’s mouth wisdom teeth did not erupt, the surface of such wisdom teeth will cover a layer of gingival blind pockets, gingival blind pockets will retain a large number of bacteria and food residues, these substances in the body’s immune function is low, it will cause the gums appear red and swollen, when the inflammation spread to the soft tissue of the facial gap, in the treatment of antibiotics to reduce the effect; 2, periapicalitis: can cause facial infection, often due to anti-inflammatory to play the effect of swelling. When the inflammation spreads to the interstitial soft tissues of the face, it will cause facial swelling, and in the treatment, sufficient antibiotics should be used to reduce inflammation to play the effect of swelling; 2, periapical infection: it can cause facial infection, often because the teeth have deep and large caries, which has caused pulpitis, and pulpitis spreads along the apical hole tissue to the apical bone tissue, and even the interstitial soft tissues of the face, it will cause toothache at the same time cause swelling of the face.