If it's hands and forearms, it easily could be nerve compression in the elbow, which is VERY common with gaining alot of weight and muscle pumps. The ulnar nerve is very sensitive to this because it passes through the cubital tunnel which is mostly muscle and tendon pathways (and less bone). Extreme muscle pumps and certain exercises can actually cause the ulnar nerve to shift across the elbow unnaturally and become pinned.
yes you are correct but if the tingling went all the way down the arm the neck or brachial plexus area is the culprit. If its mostly in your pinky finger and a few fingers next to it then it is the ulnar nerve. Thanks for clearing that up
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