Children’s tooth decay (clinically known as caries) toothache can be quickly and effectively relieved by filling, root canal treatment or tooth extraction. 1. Filling: When tooth decay causes the nerve to lose the protection of the tooth tissue and the pain of hot and cold stimulation occurs; the caries filling treatment can be carried out to repair the decayed part of the tooth, in order to achieve the purpose of quick pain relief. 2. Root canal treatment: when caries causes the nerve to become infected and inflamed, resulting in spontaneous pain or biting pain and other symptoms; root canal treatment is necessary to remove the inflamed pulp tissue in the root canal in order to quickly stop the pain. 3. Extraction: If the caries is severe enough to cause most of the tooth tissue to be missing, and the remaining residual root is inflamed and causes toothache, it can be extracted to relieve the pain effectively. Children with tooth decay and toothache are advised to seek medical attention for symptomatic treatment to prevent delays.