Children’s toothache may be caused by factors such as apical periodontitis, acute pulpitis, etc. Root canal treatment and medication can be taken to relieve the pain. 1. Periapical inflammation: there are many causes of periapical inflammation, mainly due to bacterial infection, mostly manifested as pain, occlusal pain, swelling of the root of the tooth, and may be accompanied by fever, fatigue and other systemic symptoms. Because most of the pulp in apical periodontitis is necrotic, root canal treatment is often used in clinical practice. When the redness and swelling is serious, you can use metronidazole, cephalosporin antibiotics, ibuprofen and other drugs to relieve the symptoms as prescribed by the doctor. 2. Acute pulpitis: a more serious inflammatory lesion of the pulp, belonging to the irreversible damage. Most of the acute inflammation of the pulp tissue caused by bacterial infection, there will be pain and other symptoms, the first choice of root canal treatment, and root canal treatment after the crown restoration. Endodontic treatment is preferred, followed by crown restoration. Pulpotomy is also feasible. In addition, it is recommended that children should pay attention to oral hygiene, brush their teeth and rinse their mouths before and after meals, maintain periodontal health for a long time, and develop good hygiene habits. Avoid eating too cold, too hot, spicy and other stimulating food, so as not to cause severe pain. There are many other reasons for your child’s toothache, and it is recommended that you visit your doctor in time to have a specialist assess the treatment.