The causes and treatments of tooth biting pain are mainly as follows: 1, the tooth suffers from acute and chronic periapical inflammation, at this time there is usually a relatively large area of decay on the tooth. If the swelling of the tooth root is very obvious, you can also take the appropriate amount of oral anti-inflammatory drugs to control the inflammation, you can take oral cephalosporin and metronidazole tablets for anti-inflammation. 2, the surface of the tooth appears hidden fracture, biting something very painful means that the hidden fracture has reached the deep dentin, or even close to the pulp, if it has reached the pulp cavity, the tooth has to undergo root canal treatment. If the tooth has reached the pulp chamber, the tooth should be treated with root canal and then the crown should be restored with porcelain crown or all-porcelain crown; if the fissure is only confined to the dentin, the fissure can be ground out and then the tooth should be filled with composite resin. 3, the tooth suffers from periodontitis, which is common in patients with serious periodontal disease, such patients’ teeth will have different degrees of looseness, and there is no way to withstand excessive biting stress, so in the diet, we should Avoid eating too hard food, and do systematic periodontal treatment to control the further development of inflammation, ultrasonic cleaning treatment and periodontal scaling treatment, etc. Extraction is recommended for loose teeth of second degree or more with occlusal pain.