Have you ever had a cramp in your feet, toes or your legs? If you have, then you’ll know it takes a minute or two for it to go away. But when it does, it means you can feel your feet, toes or legs again, and you can stand up, wriggle your toes and walk again. When you’ve got cramp, you know about it, especially hand cramps, especially if you’re driving, writing, typing or using your hands at the time. Cramps in hands can happen just as much as cramps...