Ann--pain/numbness on one side of your hand like that (either the thumb, index finger, and middle finger, or the last 3 fingers) probably does come from a nerve compression. But if it goes away when you turn your head or move your shoulder, the compression isn't in your wrist. It's probably either at the nerve root in the neck, or at the thoracic outlet in the front of the shoulder. Mine is in the shoulder. I've found the yoga pose "warrior" to be very helpful, along with deep massage in the trapezius muscle.