A toothache with half a swollen face is in most cases caused by an infection, and the risk is not significant as long as it is treated promptly. The more common cause of this symptom is wisdom tooth pericoronitis, or more serious periapical infection caused by the surrounding space. In both cases, it is necessary to go to a professional dentist for professional treatment as soon as possible. In the case of periapical wisdom tooth infection, it is necessary to apply hydrogen peroxide and saline rinse alternately in the corresponding local area, while the systemic application of drugs to control the infection, do not let it spread further, wait for the non-painful period, remove the wisdom tooth, even if the disease is cured. In the case of interstitial infection caused by apical infection, it is also necessary to find the location of the affected tooth and perform pulpal drainage treatment for the tooth. For facial swelling, it is important to check for definite pus and, if necessary, to perform an incision and drainage of the swollen area. In most cases, drainage and systemic antibiotics are sufficient to treat this type of infection. However, it should be noted that when these symptoms appear, the patient 1 must seek medical attention as soon as possible. If left untreated for a long time, it may cause further aggravation of the infection and cause more serious bacteremia or even sepsis, causing greater risk.