Nerve irritation: The sensation of electricity is connected to the irritation of a nerve and in your case, one of the three main nerves supplying your arm and hand. In your case where it involves the arm and hand, the nerve is likely being irritated in the arm pit of the involved side and/or the neck. With your medical history, it is imperative you see your doctor ASAP about this problem.
Answered 2/21/2015
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