A tooth extraction that causes a neighboring tooth to loosen for a time may or may not heal on its own. Specifically need to be judged according to the condition. 1. Will be self-healing: If the alveolar fossa is deeper after tooth extraction, the roots of neighboring teeth are exposed in the alveolar fossa. Pain is produced by hot and cold stimuli, as well as a slight loosening. Symptoms will be relieved when new bone covers the root surface, and the tooth will generally heal on its own. 2. Will not heal by itself: If the distal and middle roots of the neighboring teeth are fractured, resulting in loosening, pain and other symptoms, it is usually difficult to heal by itself. It is necessary to perform root splitting or root amputation to preserve the healthy root and fabricate a joint crown restoration after root canal treatment in order to recover. If patients experience pain and severe tooth loosening after tooth extraction, it is recommended that they go to the hospital in time and follow the doctor’s instructions to avoid delaying their condition.