Undo a cramp with ice. Stern suggests you keep a paper cup of ice in the freezer for just such emergencies, then massage the area on and around your cramp as needed. Tear down the edge of the cup and, holding the paper end, rub the ice over the cramped muscle. Massage the area with ice for no more than ten minutes or until the area is bright red, which indicates that blood cells have returned to heat the cramped muscle. Or use an ice pack or if nothing else is handy a bag of frozen vegetables.
Heat is another option.
Heat improves superficial blood circulation and makes muscles more flexible, so some people find that heat is more soothing for muscle cramps than ice, says Stern. Try a heating pad for 20 minutes at a time, or even a warm shower or bath. Massage the muscle with your hands following ice or heat. So if you've been on the road for an hour, get out and walk around for five minutes. The information given here is designed to help you make informed decisions about your health.