You might have a slightly pinched nerve somewhere. These things tend to work themselves out. If it lasts more than a couple of days, it probably wouldn't hurt to get it checked out. What's your potassium intake look like?
got to deal with it until its gone, i get it in my biceps and triceps alot, its just you caught something during your workout. it will eventually go away on its own. i get it at about every 3 month intervals if i do to much work in the gym and dont stretch the muscle before exercising them.
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