the tingling in your arm could be carpal tunel syndrome it could be leading to your main vein that goes up into your head if i were you i would seek medical help dont give up until you have the answers you are looking for. It could e very very serious you could lose muscles in your arms if not treated right away.......
This could be caused by many things... immediate thought- were you in a car accident and suffer whiplash? head ache and pain in arm - pinched nerve in neck? Coincidence? and the two symptoms are not related... pinched/irritated nerve in shoulder or elbow.