The involuntary shaking of the limbs or even the head and neck is medically known as tremor. It is only a symptom that a part or all of the body exhibits involuntary rhythmic tremors, which are clinically subdivided into: resting tremor, motor tremor, postural tremor, retrograde tremor and vibratory tremor, etc. 1, resting tremor that is muscle in the relaxation of the limb shaking, disappear during sleep, more rhythmic. Parkinson’s disease or syndrome belongs to this category. 2, motor tremor is not present at rest, but comes on during movement. It manifests as rhythmless, large amplitude, and often seizes due to emotional excitement and mental stimulation. This is the result of antagonistic muscle coordination disorder. It is often a reaction to cerebellar lesions, such as cerebellar tumors, combined arm lesions, cerebral vascular sclerosis, etc. 3.Postural tremor is also called intentional tremor. In fact, this kind of tremor is classified as motor tremor, that is, it occurs when the body is in a specific posture (such as lying or sitting) or engaged in a certain purpose movement or maintaining a certain posture, and disappears when it is stationary. Although the tremor is manifested as hand tremors, the root cause of the tremor is in the brain and is due to damage to the areas of the brain involved in motor coordination. Clinical causes include Parkinson’s syndrome, hepatomegaly, hepatic encephalopathy, cerebellar and brainstem lesions, cerebral arteriosclerosis, cerebral ischemia, drug intoxication, dementia, etc. If elderly people have symptoms of hand tremors that are becoming more and more severe, they should seek prompt medical attention for proper examination to identify the cause and proper treatment.