The process of diabetes (or prediabetes) tends to lose magnesium thru the urine. When this happens the muscles tend to complain, cramp and cannot relax.

Try soaking in a tub with epsom salts. If this helps a little, that is a sign you need a supplement or topical form, to replace what you are losing. Magnesium is the mineral that relaxes muscle contraction. Calcium is the mineral that causes contraction. When they get out of balance it can be very uncomfortable.

There is a new topical magnesium, now available at WalMart. It is really effective, and you need to try it. Morton's epsom lotion.
http://www.mortonsalt.com/for-your-h...-epsom-lotion/

If the epsom salt soaks work a bit...the lotion will be much more efficient. It is only $5.98 and you only need a little bit daily.
(about a quarter's diameter rubbed in well). You can also do oral
and WalMart has the SlowMag (which is well absorbed, unlike magnesium OXIDE which is not). One tablet twice a day of this will help too. If you are very low in magnesium now, you may have constricted circulation and oral may not work until you open up your blood vessels where the cramping is, and elsewhere.

Apply the lotion on your cramps, and also a small amount on the backs of the hands, and wrists. The veins there are close to the surface and the mag gets in quickly there.

Up to 70% of Americans are low in magnesium today because of poor food choices. So because this is so common and especially in diabetics, please take care of this ASAP...you will feel much better.