hello, I m a lung cancer patient that s been taking oral chemo. medication for a few years now. Also, I was traumatized in 2016 by being struck in the head. I ve been to several neurologist & hand specialist, no one has been able to diagnose hand symptoms. mid section of arm is feeling numb, down to my wrist which is slightly swollen and feels cold most of the time. then I m experiencing numbness & stiffness to my hand and fingers. I m losing the ability to hold things & move my fingers normally, can you advise?