Toothache half face swollen, can carry out detailed oral examination, take whole mouth surface tomography film before treatment, can be treated by open pulp drainage, gum flap surgery and other methods, as follows: 1, open pulp drainage: if the affected tooth exists deep cavity and hidden fissure, triggering acute periapical inflammation, to carry out open pulp drainage, to promote the root of the inflammatory secretions through the root canal discharge to the oral cavity, abscess range is larger, can be in the vestibule 2. Gingival flap surgery: If an abscess occurs, gingival flap surgery can be performed to remove the calculus and granulation tissue attached to the root surface, apply 3% hydrogen peroxide solution to rinse thoroughly, and apply tetracycline gel to speed up healing. It is best to apply cephalosporin and nitroimidazole antibiotics systemically, and in case of apparently loose teeth with pus overflow, the diseased tooth can be extracted directly under local anesthesia for the purpose of rapid drainage.