What could cause severe body cramps. The cramps are all over body, calves, thighs, feet, hands, ribs cage area & back. These are not light cramps, they are hard twisting cramps. I ve cut out coffee, thinking it might contribute to the bit of diuretic it (might cause) I ve had general blood work done, this is normal. I take extra magnesium, calcium, D3 & mult. vitamin. I use calm, muscle relaxers, 911 for cramps, & hot water, This takes along time to help but it dose. I just want to know what could be the possible reasons & what could help.