Tongue tremor refers to the involuntary trembling of the tongue in a patient at rest. It appears as a slow rhythmic tremor, with 4 to 6 tremors per second, with variable amplitude, and intensifies with mental stress. Many patients also have postural tremors of 5 to 8 times per second. Tongue tremor is most often seen in patients with Parkinson’s disease and is a symptom of damage to the nervous system. It may also be caused by damage to the brain nerves or by stimulation of the brain nerves due to long-term drug use, and is characterized by a slow rhythmic tremor, with 4 to 6 tremors per second of variable amplitude, which may increase with stress. Many patients also have postural tremors of 5 to 8 times per second. Diagnosis of tongue tremor: 1. Idiopathic tremor: It is a dominant genetic disease, manifesting as involuntary tremor of the head, jaw and limbs, and the frequency of tremor can be high or low. The disease does not have reduced movement, increased muscle tone, and postural reflex disorder, and disappears after drinking alcohol, and can be differentiated from primary Parkinson’s disease. 2, benign tremor: refers to physiological tremor (not easily perceived by the naked eye) and functional tremor without organic brain lesions. Functional tremor includes: (1) Physiological tremor enhancement (visible to the naked eye), mostly postural tremor, associated with enhanced adrenergic regulatory response; also seen in certain endocrine diseases, such as pheochromocytoma, hypoglycemia, hyperthyroidism. (2) Cocaine and alcohol intoxication and side effects of some drugs. Hysterical tremor, mostly with psychogenic triggers, distraction can relieve the tremor. (3) Others: tremor that occurs during emotional stress and during fine motor movements. Benign tremor is clinically free of the characteristic manifestations of Parkinson’s disease such as myotonicity, reduced movement and postural abnormalities.