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And then it went away when I started it again. It was better then a drug â¦ and no side affects! (Later, I found out that the sourse cause of the heartburn was a simple vitamine C tablet that I had also been taking.) Just one more thing. John Lee, M.D. also said that magnesium deficiency can cause leg cramps.
The cause of involuntary muscle spasms should be determined. Photo Credit Jupiterimages/Photos.com/Getty Images. Involuntary muscle spasms may take the form of minor twitches or larger limb jerks. The behavior goes by a number of names, including myoclonus, muscle fasciculation and benign muscle spasms.The muscle spasms may be a mere annoyance, or they may be a sign of a serious health condition.pilepsy. Epilepsy is a cause of both major and minor involuntary muscle spasms. While most people associate epilepsy with major seizures, small muscle twitches may be the only outward symptom of the disease, according to MayoClinic.com.