Definition of meta-analysis : a quantitative statistical analysis of several separate but similar experiments or studies in order to test the pooled data for statistical significance new!
Hand numbness is usually caused by damage, irritation or compression of one of the nerves or a branch of one of the nerves in your arm and wrist. Diseases affecting the peripheral nerves, such as diabetes, also can cause numbness, although with diabetes similar symptoms usually occur first in your feet. In very uncommon instances, numbness can be caused by problems in your brain or spinal cord, although in such cases arm or hand weakness or loss of function also occurs. Numbness alone is only rarely associated with potentially life-threatening disorders, such as strokes or tumors.
It is caused by nerve compression and can be quite painful, although symptoms usually start gradually. At first, an affected individual may notice numbness and tingling in the hand, which is often eventually followed by continuous pain. Another cause of left hand numbness could be nerve damage or disease. In such cases, the lack of sensation is frequently associated with pain described as prickling pins-and-needles in the hand. Burning sensations are also common with such conditions.