Toothache needs to be treated in different departments according to different reasons, including stomatology, periodontology and oral surgery, as follows: 1. Stomatology: Most of the tooth pain is caused by suffering from tooth decay, or even pulpitis and periapical inflammation. The pain of pulpitis is relatively intense, and this part of toothache should be treated in the department of oral medicine or endodontics. If the tooth decay needs to do the filling treatment of cavity, if once it develops into pulpitis or periapical lesion, the tooth needs to undergo root canal treatment. 2. Periodontology: If the tooth pain is not limited to a certain tooth, but multiple teeth in the mouth have swelling and pain, or even different degrees of root exposure, gum bleeding and tooth loosening, it needs to go to periodontology for treatment. This kind of tooth means suffering from periodontitis, need to go to periodontal department for periodontal cleaning and scraping treatment of periodontal. 3, oral surgery: If the pain of the tooth is because of biting hard objects or being traumatized, causing the tooth to break or fracture. In this case, you should go to oral surgery for treatment. Most of the teeth of this kind cannot be retained and need to be extracted, so you should go to surgery for treatment.