A child who has knocked his tooth without bleeding but with a little pain needs to go to the dentist to find out the cause and treat it promptly. When a child knocks a tooth, there will be localized tissue loss, which may also lead to enamel damage, loose teeth and other conditions, so it will be a little painful. In this case, it is necessary to go to the dentist for dental X-ray examination to understand the status of the root of the tooth. Observe the appearance of the tooth to see if there is any serious damage to the enamel or fracture of the tooth, etc., and clarify the cause of the tooth pain before proceeding with restorative dental treatment. Children should choose warm semi-liquid food, such as millet porridge, for their diet after toothache. Warm, lightly salted water can also be used to rinse the mouth and brush the teeth every night before going to bed.