Our arms have rings or tunnels that hold nerves and tendons in place. Some of us are born with tighter or narrower tunnels. Narrow tunnels can squeeze the nerves in our hands causing numbness, tingling, and weakness. For others, the tendons can grow thick inside its tunnel resulting in pain.
Nerve Problems of the Arm
Tingling, weakness, or pain in your hands or arms can be a sign of a nerve problem. This may result from a cut or laceration that produces loss of motion or feeling. In other instances, it may have to do with the inner mechanics of your arm.