Possibly Low Blood Levels low blood levels of calcium and magnesium. Low calcium and low magnesium, which increase the activity of nerve tissue nonspecifically, also can produce tetanic cramps. Alot of things My best guess on this, Hope this helps !
Similarly, cramps are a relatively frequent complication of the rapid body fluid changes that occur during dialysis for kidney failure. Low blood calcium or magnesium: Low blood levels of either calcium or magnesium directly increase the excitability of both the nerve endings and the muscles they stimulate.
