Thanks for providing more information.
Possible differential diagnosis causing radiating pain in arm,hand include Nerve compression most likely in the neck but could also be at the shoulder level,Carpel tunnel syndrome.
An MRI of the neck should be done.
You shouldn't ignore your symptoms and make an appointment with an Orthopedist for a clinical examination.
You can do massage with muscle relaxant on affected area.
It may be possible that poor sleeping posture can be a aggravating factor.
Avoid activities that require you to keep your arm bent for long periods of time.
If you use a computer frequently, make sure that your chair is not too low.
Do not rest your elbow on the armrest.
Keep your elbow straight at night when you are sleeping.
Try elbow or wrist splint.
Physical therapy can be effective.
Hope this helps.
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