The first thing that should be clarified is the age at which this occurs. For example, for adolescents in the tooth replacement period, or for the elderly in middle age, the appearance of loose teeth is generally a normal physiological phenomenon. Adults also have physiological mobility of teeth, if there is only a slight wobble when breaking by hand, and no other discomfort symptoms, it may also be a normal situation. In addition, it may also be caused by oral diseases. I. Physiological factors: If the age is 5-14 years old, in the growth and development period, it may be due to the loosening of the milk teeth during the tooth replacement period. If it occurs in the elderly, it may be due to ageing, resulting in natural gum recession and thus loose teeth. Both of these two special groups of people can have a slight wobbling phenomenon when breaking the teeth by hand, and generally do not need to deal with. Second, pathological factors: 1, dental calculus: including supragingival calculus and subgingival calculus. The accumulation of calculus in the periodontium may lead to gingival recession, thus loosening the teeth and causing slight wobbling when breaking them by hand. Ultrasonic scaling should be performed regularly and oral cleaning should be maintained in daily life to prevent calculus formation; 2. Periodontitis: local inflammation occurring and spreading may lead to alveolar bone resorption, periodontal pocket formation, and slight wobbling signs when breaking the affected tooth by hand, requiring anti-infection treatment, such as oral penicillin and metronidazole. At the same time, when the symptoms are serious, can be complicated by periodontal abscess, need to be incised and drainage or even extraction treatment; 3, periapical periodontitis: when the occurrence of periapical periodontitis, the pulp tissue is often involved at the same time, manifested as the tooth with a slight shaking by hand, gum swelling and severe pain, etc.. Patients with acute periapical periodontitis are able to restore their teeth to a stable state. In chronic periapical patients, when the apical lesion is larger or develops to the root side, causing more periodontal membrane to be destroyed, the tooth can become loose, and the situation is usually more serious, requiring root canal treatment or tooth extraction; 4, intra-maxillary lesions: some cysts or tumors located in the jawbone near the root of the tooth, compressing the adjacent gum or root, when breaking the affected tooth by hand, there will be a slight wobbling symptoms. At this time, the site of the lesion should be clarified through imaging examination, and then surgical removal treatment; 5, oral trauma: when a fall or a blow injury to the mouth may lead to loose teeth and slight shaking when breaking by hand, it is recommended to go to the hospital in time to deal with the trauma if necessary. If the tooth loosening is more serious, the prognosis is generally poor, often requiring extraction of the affected tooth to prevent infection of the affected gum tissue, and if the tooth is intact, reset fixation can be attempted.