Sudden toothache without warning may be a symptom of acute pulpitis, usually the effect of oral painkillers is relatively weak, it is recommended to go to the dentist in time for examination to confirm the position of the tooth. After confirming the position of the tooth, endodontic treatment can be carried out by drilling the tooth and removing the nerve or sealing the inactivator. Observe for about 10 days and then make a follow-up visit, which will remove the nerve and fill the tooth with alternative materials, and the crown will be tightly filled. If the tooth is observed to be asymptomatic, it can be restored with a porcelain crown or a high onlay to ensure that the tooth can be resistant to force. If there is a sudden toothache without warning, there may also be tooth swelling or periodontal abscess, and root canal treatment and periodontal treatment are recommended accordingly.