what causes hand numbness from working arms
Numb hands and tingling in the hands can be caused by diseases of the central nervous system. Multiple sclerosis, stroke, and other disorders of the brain and spinal cord may sometimes cause numbness in the forearm and hand. Other diseases can affect the nerves in the upper limb, causing numbness, tingling, burning.
Pressure upon the arm nerves or vessels causing numbness, tingling or temporary paralysis of the arm may result from: 1  Sleeping with the hand under the head. 2  Sitting with the arm hanging over the back of a chair. 3  Wearing straps or carrying a bag or rucksack.