Causes It is caused by dental infection or tooth abscess, involving molars and premolars, as well as submandibular sialadenitis, injuries to oral mucosa, and mandibular fracture.

病因原因是牙齿感染或牙齿脓肿，累及磨牙和前磨牙，同时伴有下颌下涎腺炎、口腔黏膜损伤和下颌骨折。