Night Cramps?!

Night Cramps?

I tend to have night cramps in my calf muscle.
(A night cramp is a pain that generally occurs in the night which is due to the muscle spasm when a muscle contacts too hard. They may wake you from sleep. It can become a distressing condition if your sleep is regularly disturbed. The muscle can stay tendered for up to 24 hours after the night cramp. )
After the cramp ends I normally just fall back asleep but the next morning I'm in pain for the next couple days. What can I do to get rid of some of the after pains?

Could be a deficiency of potassium, calcium, magnesium or Vitamin B6.