Numbness of the hands when getting up in the morning is caused by the following reasons. First, cervical spondylosis, cervical spondylosis, if there is cervical spine physiological curvature changes, disc herniation compression to the nerve root, can cause numbness of the upper limbs, if the early compression symptoms are not serious, numbness can be paroxysmal, in the night sleep activities are reduced, muscle contraction, peripheral nerve blood supply is poor, it is easy to induce numbness symptoms. Second, elevated blood viscosity, mostly seen in patients who are not willing to drink water, or have high blood sugar, high blood fat or blood rheology abnormalities, the patient’s blood viscosity is higher than normal, resulting in poor peripheral circulation, which is more obvious when sleeping, and is prone to peripheral nerve ischemia, hypoxia changes, causing numbness. Third, multiple peripheral neuropathy, generally due to metabolic disease or ischemic disease caused by multiple peripheral nerve injury, common in diabetes mellitus, uremia or multiple arteriosclerosis patients, also in the night time activities lead to ischemia, hypoxia symptoms aggravate, easy to appear numbness.