It sounds like a neural issue but please understand I cannot be accurate online and without properly assessing you.
but there are 3 main nerves in the arm:
Median nerve - runs front of shoulder, down forearm into thumb and first 2 fingers
Radial nerve - runs down to mid forearm
Ulna nerve - runs down to last 2 fingers
The nerves come from a brachial plaxus in the neck/shoulder area where they branch off. However they have a very close relationship with the shoulder muscles as you can imagine.
So if you have done a training session involving these muscles there could well be some neural tethering resulting in some of the sensations you describe here.
Now the tricky bit is that nerves dont like to be stretched and they dont like velocity so you need to
mobilise them rather than actually stretch them. What this means is finding the point of tension, tingling or tightness and then releasing it immediately and repeat this 10-15 times. If you are lucky it may release immediately otherwise it may need to be done once or twice daily for a few weeks.
This is a median nerve release technique as an example:
http://www.youtube.com/watch?v=qmE8Rb6ao6Q Please be aware this is only one concept of what could be occuring and there maybe other issues to consider so I always advise you see a qualified professional for specificity and bespoke accuracy to the advice you need.
<message edited by Rachfit on 29 December 2011 14:47>
'You can only manage what you can measure' Rachel France DipITS,MBCA
Master Trainer
Specialist Biomechanics Coach
(Injury '
prevention', Low Back Health & Resistance Specialist)