Hello Dr: I m 55yr old, diabetic, but under control, take insulin as well as metformin, & crestor. At least 2-3 times a week while sleeping I have to get out of bed because of extreme painful leg cramps below the knee. But they are not strained muscles related but more tendon like. Its as if my leg, can be one or both are locked in an unusual position that requires me to stand and force the relaxation of the leg by stretching or massaging for at least 1/2 hr or more. Any guidance would be appreciated. Richard