Chin tremor is an involuntary rhythmic trembling of the muscles of the lower jaw. The symptom accompanies various conditions in children and adults: parkinsonism, perinatal pathology of the central nervous system, hydrocephalus, etc. Tremor is rarely isolated, usually combined with other manifestations (cerebral, focal). Comprehensive diagnostics includes laboratory tests, tomography, neurophysiological methods. Medications are prescribed that affect the symptoms, developmental mechanisms and causes of trembling, in some cases, neurosurgical intervention is necessary.