The tooth does not hurt but it hurts when you bite it may be due to the presence of apical periodontitis, periodontitis, temporomandibular joint disorder, etc., which usually does not heal by itself. 1. Periapical inflammation: after the root tip of the tooth is inflamed, the inflammation spreads, which will also lead to the situation that the tooth doesn’t hurt but it hurts when biting, and then you need to carry out root canal treatment in time. 2. Periodontitis: periodontal tissue is the surrounding tissue of fixed teeth, when it is inflamed and causes resorption of alveolar bone, biting will cause impact on periodontal tissue, thus causing pain, in this case, periodontal treatment is needed. 3. Temporomandibular joint disorder: this is mainly caused by bad oral habits, occlusal factors or mental factors, usually manifested as teeth do not hurt but the bite will hurt, which can only be cured by treatment. It is necessary to correct the usual bad biting habits, restore the normal biting relationship, but also psychological counseling, with hot compresses, physiotherapy or closed therapy to relieve pain. Since there are many reasons why teeth don’t hurt but it hurts when you bite, it is important to consult a doctor to find out the specific cause and actively treat it.