This was on the internet so it must be true. Sounds reasonable so put your mustard beside the bed tonight before you go to sleep.
Leg cramps, says Dr. Michael Fredericson, Professor of Physical Medicine and Rehabilitation at Stanford University, are caused — at least in theory — by an "overexcitation of the nerves in your legs." A food like mustard, then, might work to override the signal your legs are sending to your brain by triggering the nerves in your mouth or throat. That way, says Fredericson, "the painful stimulus, or the irritating one, doesn't have a chance to register."