A 13-year-old child’s toothache may be caused by dental disease, periodontal disease, according to the situation need to remove the external local stimuli, according to the specific conditions of filling, root canal treatment or drug treatment. 1. Dental diseases. 13-year-old child toothache may be caused by dental caries deep caries, pulpitis or periapical inflammation, will be due to external hot and cold stimuli to produce pain, pulpitis may have spontaneous pain. In case of deep caries, filling is needed after removing the decayed material. Pulpitis and periapical inflammation usually require root canal treatment to remove the infected or necrotic pulp. 2. periodontal disease. 13-year-old child toothache may also be due to dental food impaction caused by acute gingival papillitis, teeth can be spontaneous pain, generally seek medical attention to remove the local impaction after the pain can be significantly relieved, and then can be localized iodine povidone medication to eliminate inflammation. 13-year-old children with toothache, it is recommended to go to the hospital in a timely manner to avoid inflammation aggravation affecting life.