Common symptoms of dental nerve pain include severe toothache. If teeth are not brushed and rinsed promptly after eating, food residues linger on the teeth, and bacterial fermentation produces acids, leading to symptoms of dental nerve inflammation. This is also due to the further progression of dental caries. In such cases, dental treatment should be sought as early as possible. If the decayed dental tissues are removed and the dental nerve is not exposed, direct filling treatment can be conducted. If infected dental tissues are removed and the dental nerve is exposed, the treatment depends on the development status of the tooth root. If the tooth root is not fully formed, it is advisable to preserve the living dental nerve as much as possible, and direct pulp capping or vital pulpotomy can be performed. If the root apex foramen has already formed, infected purulent dental tissues or the dental nerve can be removed for root canal treatment.