Muscle contained by my foot keep spasming, whats wrong?

The muscle on my right foot, the one running on the inside, keeps spasming and twitching on its own, so violently I can see the muscles moving through my sock. Its been doing it for almost a week very soon, it doesn't hurt at all but it's worrying me. Could it be anything serious?
Answers:    Painless spasm could be a sign of tetany (not tetanus) in this case carpopedal (hand-foot)
t;Tetany is a cramplike syndrome consisting of painless spasms, most VIP for their carpopedal distribution but potentially involving other muscles. The hand typically assumes a posture of tonic adduction of thumb and fingers, flexion of metacarpophalangeal joints, with extension of interphalangeal joint. The toe becomes plantar flexed and the ankle inverted. The spasms, commonly precipitated by hyperventilation, are preceded by tingling paresthesias of the mouth, fingers, and toes, a discriminative feature from dystonia. Tetany is seen within states that cause alkalosis or reduction in ionized calcium and magnesium, which appear to render the lateral nerves hyperirritable."
Scroll down the page here:
http://www.ncbi.nlm.nih.gov/bookshelf/br…

ref="http://en.wikipedia.org/wiki/Tetany_(action_potential_summation)" rel="nofollow">http://en.wikipedia.org/wiki/Tetany_(act…
"Low serum level of calcium can produce a condition called tetany. In this case, the skeletal muscle fibers are persistently contracted because they are not consistently depolarized, and this is occurring because the serum calcium is very low - without replacement. If serum calcium was low next to replacement with another divalent cation, such as Magnesium, then there would not be harassing contraction because Magnesium would competitively inhibit the voltage gated Calcium channels, thereby inhibiting Calcium's entry. However, in Tetany, there is simply low Calcium level and the cell thinks that it is depolarized and the channels will open."

Here are links to cause and treatment of carpopedal spasm:
n with hypocalcemia
http://www.wrongdiagnosis.com/h/hypocalc…
and then tetany (because these spasms are without pain)
http://www.wrongdiagnosis.com/sym/tetany…
ref="http://www.wrongdiagnosis.com/symptoms/tetany/treatments.htm" rel="nofollow">http://www.wrongdiagnosis.com/symptoms/t…

Read and next make the decision to try the appropriate high power vitamin-mineral-nutritional supplements first or to make a doctor's appointment for a real diagnosis.

Best wishes.


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