A loose tooth requires dental treatment, or extraction. When a tooth becomes loose, the first thing to do is to find out the cause of the problem and treat it accordingly. The common cause of tooth loosening is apical inflammation, tooth decay without timely filling, bacterial infection of the dental nerve resulting in inflammatory destruction of the apical region, clinically there will be loose teeth, this situation requires early dental treatment to eliminate the inflammation of the apical region, the loosening of teeth can be improved. Loose teeth can also be caused by early contact of teeth, high point of teeth bite can lead to occlusal trauma, acute periodontal membrane damage can also cause loose teeth, this situation needs timely adjustment to improve the loose teeth. Loose teeth can also be caused by dental trauma, where the teeth are loosened by external forces, and if the loosening is serious, the teeth can be fixed. If the loosening of teeth is caused by periodontitis, the teeth need to be scaled, and then local rinses and medication are applied to eliminate the inflammation around the teeth, and the loosening of teeth can disappear on its own. If the loose tooth is caused by the destruction of the bone in the apical region, the tooth has no value to be preserved, it needs to be extracted and then the tooth should be placed as soon as possible. Therefore, if a tooth is loose, root canal treatment, periodontal treatment, or tooth fixation should be carried out as soon as possible, and teeth that have no retention value should be extracted and set in place.