I went to bed with a headache last night and as I laid there, developed severe cramps in my abdomen and then it shifted to the toes on my left foot and then it shifted to the toes on my right foot and back and forth lasting for hours unitl it finally subsided. I am thinking it stems from spine damage I had from a crack in my back years ago, but also know that low potassium can cause it as well as other causes. Any body have a clue? I am a former stroke victim as well. Left side of my brain.