what causes cramps in feet to make toes turn up
You may also be deficient in several vits and minerals, such as potassium, vit D, and all the B's, including the magnesium that kaismama mentioned. A deficiency in any or all of those (and others) can cause your legs, feet and toes to cramp (and curl) as you've described. Ask your doc for a blood test to determine if you are deficient in any vits and minerals, very important.