Bite pain after root canal treatment may be caused by filling material irritation, incomplete root canal treatment, overbite, etc. It can be dealt with through the use of medication, re-root canal treatment, and adjustment of tooth grinding. 1. Stimulation of filling materials: filling materials such as cementum may stimulate the periapical tissues after root canal treatment, resulting in occlusal pain, but this situation will generally return to normal, so there is no need to deal with any treatment, but you can also use ibuprofen delayed-release capsules, aspirin tablets, celecoxib capsules and other painkillers according to the doctor’s instructions. 2. Incomplete root canal treatment: In the process of root canal treatment, the infectious material and debris in the root canal may be pushed out of the apical foramen, resulting in recurrence of occlusal pain after root canal treatment, and at this time you may need to re-endodontics under the guidance of the doctor. 3. Overbite: If the tooth has been having bite pain after root canal treatment, it is necessary to go to the hospital stomatology department in time to take apical radiographs and carry out occlusal examination, adjust and polish the occlusal high point in time to prevent the tooth from overbite and produce bite pain. It is recommended that any discomfort after root canal treatment should be dealt with by a doctor in a timely manner, so as not to delay the condition, and the use of medication must follow the doctor’s instructions.