And if ignored, some of the other more serious symptoms of Magnesium deficiency (low energy, fatigue, weakness, hormonal imbalances, inability to sleep, weakening of the bones,
muscle tension, spasms
and cramps, abnormal heart rhythm, headaches, anxiousness, nervousness, irritability, kidney stones) can develop."
Excerpt from - Are you magnesium deficient? Leg cramps, foot pain or muscle ‘twitches’ are usually the first signs.