It is possible that a 9-year-old child’s tooth is a bit painful after being hit by an external force, such as the loosening of the tooth, and it is recommended that parents take the child to a dentist for diagnosis and treatment. 1. 9-year-old children accidentally fall down or suffer trauma after knocking the teeth in life, the teeth will have localized tissue loss after being hit by violent external forces, which will also cause enamel damage, loose teeth and many other undesirable conditions, thus causing pain. 2. You need to go to the stomatology department to do dental radiography to understand the state of the root of the tooth, but also to do dental appearance check to see if there is serious damage to the enamel or tooth fracture, etc., to make it clear that the cause of the pain, and then help the tooth to do restorative treatment. It is recommended that children do not bite and eat hard objects with the affected teeth for the time being, and avoid external shaking, so that the teeth can fully rest.