Children with toothache at night, can be seen in pulpitis or acute gingival papillitis attack, if the pulpitis need to go to the hospital immediately to open the pulp treatment, gingival papillitis need to remove the inlay. 1. Pulpitis. Acute pulpitis attack has the characteristics of night pain, pain often can not be localized, oral examination can be found tooth decay, need to go to the hospital immediately to open the pulp extraction treatment, root canal treatment. 2. Acute gingival papillitis. Children’s teeth are loosely arranged, easy to food congestion after eating and drinking, if not timely removal of congested material, can cause acute papillitis, oral examination can be seen to have congested material generally use dental floss to remove the pain can be significantly relieved, localized gingival papillae can be used to iodine povidone medication, chlorhexidine gargle. Children’s night toothache and other causes, it is recommended that timely examination to the hospital for treatment, medication should follow the doctor’s instructions.