Children’s toothache, half of the face swollen, can be oral examination, shooting whole mouth surface tomography film after treatment, respectively, as follows: First, if the gap between the milk teeth is large, embedded food fibers caused by gingival swelling, bulging, or the formation of alveolar abscess, can be timely incision of pus, to promote drainage of pus, the application of 3% hydrogen peroxide solution to rinse pus cavity, systemic application of antibiotics to control the bacterial infection. Second, if the milk teeth produce deep caries, causing acute periapical inflammation, can be under local anesthesia to grind open the pulp cavity, remove the infected pulp, expand the apical foramen to the root canal mouth channel, promote the inflammatory secretion discharged into the oral cavity. When milk teeth form residual roots and crowns, accompanied by obvious loosening and pus overflow, they can be extracted directly to achieve rapid drainage.