Loose teeth bite pain may be caused by traumatic impact, periodontitis, acute apical periodontitis and other reasons. 1. Traumatic impact: Usually, if the patient suffers from severe localized impact, resulting in damage to the gums or tooth tissues or root fracture, it may lead to loosening of teeth and biting pain. 2. Periodontitis: usually periodontitis is a chronic infectious disease that mainly occurs in the periodontal tissues. Generally, the bacteria in plaque invade the tissues around the teeth, which may show symptoms such as redness and swelling of teeth, loosening of teeth, and pain, thus leading to tooth loosening and biting pain. 3. Acute periapical inflammation: periapical inflammation mainly refers to the acute inflammation of the tooth root and its surrounding tissues, acute pulpitis occurs if not treated in time, or chronic periapical inflammation acute attack, may lead to tooth loosening and biting pain. There are other causes of loose teeth bite pain, it is recommended that patients actively seek medical attention to clarify the cause of the disease and then carry out regular treatment.