The most common cause of loose teeth is periodontitis. Loose teeth and pain should be seen in hospital in time. According to the different reasons of loose teeth and pain, the following solutions are taken: 1, inflammation of dental pulp caused by caries, root canal treatment can be carried out; 2, periodontitis causes comprehensive lesions of dental pulp and periodontium, joint treatment of dentistry and periodontology is needed; 3, loose or very severely decayed teeth, which cannot be retained, extraction is recommended. It is recommended to pay attention to oral hygiene normally and do periodontal care in hospital regularly.