What is it that causes the pain when we are stressed?

If your getting pain in your wrist I wouldn't look to stress for the factor. I would guess it's carpal tunnel, or it could be coming from your shoulder a rotor cuff damage, the three bones or tendons from your neck or the vertebrae in your neck. The neck could be the culpert and then I would say "could be stress" so, you see it could be from a number of things. You might have tendinitis.