Mandibular gap infection can be seen in the teeth of apical periodontitis triggered, generally symptomatic drug anti-infection treatment, abscess formation requires surgical incision and drainage, in addition to the need for causal treatment of the source of infection. 1. Symptomatic treatment: submandibular gap infection can appear in the floor of the mouth pressure pain, localized swelling and redness, general anti-inflammatory treatment, the use of antibiotics (metronidazole, amoxicillin, erythromycin). If there is a sense of fluctuation, it is also necessary to carry out abscess incision and drainage. 2. Corresponding treatment: need to find the source of infection caused by the submandibular space, if it is caused by the focal tooth, need to carry out root canal treatment or extraction, if it is caused by the inflammation of the submandibular gland, need to use anti-inflammatory drugs submandibular gland inflammation, submandibular gland stones can be considered for surgical removal. Submaxillary gap infection, it is recommended to go to the hospital in a timely manner to deal with, to avoid aggravation of the symptoms, affecting the health of the body. Drug treatment should be carried out under the guidance of a doctor.