To find out if it is carpal tunnel syndrome (very common if pregnant or overusing hands by typing etc) - try tapping the front of your wrist 30x - if it tingles you have carpal tunnel, or try sitting with your wrists bent forward (like a dog begging) - if it tingles you have carpal tunnel. If these tests don't reproduce the symptoms then you may have a swollen nerve in the elbow (don't lean on them for a while or carry heavy bags with your arms hanging straight), or a nerve impingement problem in the neck, in which case you may need to improve your posture (try reading about The Alexander Technique)