Loose tooth root pain may be caused by diseases such as apical periodontitis, occlusal trauma or periodontitis, as follows. 1. Periapical inflammation: due to the local pressure buildup caused by oozing and edema in the apical area, as well as the chemical effect of inflammatory mediators, resulting in swelling and pain in the tissues around the affected tooth. When periapical suppuration occurs the affected tooth may have a floating sensation and loosening occurs. 2. Occlusal trauma: Abnormal occlusal contact or excessive occlusal force may lead to resorption of the alveolar bone, loss of tooth supporting tissues and loosening. Occlusal trauma may also lead to the emergence of hidden cracks in the teeth, hidden cracks deep into the pulp can cause inflammation of the pulp, tooth pain symptoms. 3. Periodontitis: The loss of attachment of teeth with periodontitis will lead to loose teeth, due to the exposure of the tooth root will also lead to tooth sensitivity, pain, accompanied by pulpitis, gingivitis will also cause tooth pain. Loose teeth and pain may have other reasons, it is recommended to go to the hospital in time, to clarify the cause of the disease for targeted treatment.