The fact that the hand shakes without alcohol and does not shake after drinking indicates that the patient may have a disorder called idiopathic tremor. This is an involuntary movement disorder that has some relationship with heredity, and more than 1/3 of patients have a family history. This tremor is a kind of postural tremor, when placed motionless, if there is a support, then generally will not tremble, without support, there is a tendency to appear the upper limb distal subtle tremor, when holding things or fine movements will be more obvious, the symptoms are easily aggravated when emotional tension and anxiety. One of the types of idiopathic tremor is very sensitive to alcohol, and drinking alcohol can significantly reduce the symptoms, especially when drinking white wine, and even a small amount of alcohol can rapidly improve the symptoms.