Apical periapical inflammation caused maxillofacial swelling, to emergency treatment, open the pulp open drainage. Swelling is more serious, anesthesia, anesthesia do not hit the abscess, try to avoid the abscess area, so as not to cause pain, or the spread of infection. During the process of opening the pulp, we should reduce the vibration of the drill, hold the tooth with a gloved hand, open the pulp correctly, clean the root canal, make the root canal open, and then hydrogen peroxide and sodium hypochlorite rinsing, so that the pulp cavity of the corruption of the stuff rinsed out, the pulp cavity put a cotton ball, and change the medicine in 2-3 days. Usually 5 days abscess formation, to cut the pus again drainage, drainage strip changed every day. After the inflammation disappears, the medication is changed again, and finally root canal treatment is done to repair the tooth.