Tooth bite pain to clarify the cause of the disease and then take treatment, common bite pain is mainly caused by apical periapical inflammation and fissure. 1. Periapical periodontitis: Occlusal pain mainly exists in the acute pulp phase of acute periapical periodontitis. In the acute stage, the pulp should be opened and drained under local anesthesia, and the apical foramen should be pierced, so that the apical exudate and pus can be drained through the root canal; anti-inflammatory and analgesic medication, such as oral amoxicillin, metronidazole or ibuprofen and other medications; and the root canal can be perfected at a later stage of the treatment. At the same time, crown restoration will be given in time after treatment. 2. Cryptic fissure: shallow cryptic fissure often has no obvious symptoms, while deeper cryptic fissure is sensitive to cold or hot stimulation, or there is discomfort in biting. If the superficial fissure has no obvious symptoms and the pulp is normal, resin bonding can be carried out. For deeper cracks or those with existing pulpal lesions, crown restoration is done after root canal treatment. If there is a tooth bite pain, it is necessary to go to the hospital in time to find out the cause of the disease, by a professional doctor into the diagnosis and treatment, so as not to delay the condition.