When a child has a loose tooth caused by a fall, the first thing to do is to go to the hospital for relevant examinations, such as taking dental x-rays, to see the degree of tooth loosening in person, to determine whether the tooth has broken roots and other phenomena, and to give treatment according to the severity of the loosening. If the child’s milk teeth are slightly loose due to external forces, but there is no other condition such as fracture, you can fix the teeth with periodontal splints in the dentistry department and remove them after 7-10 days, and most cases will gradually recover after a month. However, the child should be reminded not to eat hard food, pay attention to oral hygiene in daily life, disable the tooth for 3 weeks, pay attention to a reasonable diet, and go to the hospital for regular checkups later according to the doctor’s requirements. If the tooth becomes loose, discolored, swollen or painful after a long period of time after the fall, root canal treatment under local anesthesia is required, and care should be taken not to suffer secondary trauma during this period. If the root of the tooth is fractured or if the tooth is not treatable, an extraction should be considered. If the permanent tooth is lost or extracted, a denture should be restored at a later date.