A few days ago I had a series of pricking sensations in my left chest . The pricking has happened many years over the last few years and my jaw is numb and my left arm begins to ache. The numbness and arm ache usually goes away over night. I have called this to the attention of both my cardiologist and neurologist . The cardiologist says he believes it to be nerve related. The neurologist says its not due to the neuropathy I have. The problem here is I have had the discomfort in my arm and some jaw numbness for four days. Any ideas? They both have run several tests all of which were negative.