Hand trembling is medically called tremor, there are many reasons for men to have hand trembling, it can be the weather, emotions, bad habits and other physiological reasons, but also Parkinson’s, cerebellar lesions and other pathological reasons. A physiological reasons: 1, the weather factor: if you encounter cold, the whole body will have tremors, hand trembling; 2, emotional factors: people in the mental tension, excitement, such as anger after the hand will also shake, is a physiological cause, does not belong to the organic disease; 3, bad habits: for example, hand pulling very heavy items, can lead to a transient hand shaking, usually after a period of rest can disappear on their own. Second, pathological causes: 1, Parkinson’s: in quiet rest, the hand on top of the support, in the case of complete relaxation appears hand trembling. This typical tremor is seen in Parkinson’s disease, which can be manifested as a shaking of one limb first, gradually progressing to the opposite limb within 2 years; 2, cerebellar lesions: shaking in the activity or contact with the target, called intentional tremor, mostly seen in lesions of the cerebellum; 3, idiopathic tremor: the hand maintains a posture, such as shaking when holding flat. For example, shaking when holding the hand flat, called postural tremor, can be seen in many diseases, such as idiopathic tremor.