Check your blood levels. Chemo can through the basics off. It sounds like a potassium, calcium, vit D deficiency.

I had terrible hand, toes, and occasionally leg cramps:( but the hands were the scariest! My doctor told me yo take magnesium !! Within 2 days I noticed huge difference. Been on them 1/ day for 2 months. I can't remember my last cramp:) they are extremely rare now. So, ask your doctor about magnesium- I buy over the counter bottle, no script.

At one time I was having bad cramps in hands and legs. I think I read on this site to put a bar of soap in bottom of my bed to help with this problem. It sounds crazy..but, it worked!

My Doc said "pop a tums"...It is a small calcium or magnesium deficiency in the muscle, the tums goes right for it. Mine are not constent, the answer is based on my muscle spasms in my leg..feels like the tendons in the back are dancing the twist together...

Thanks for the ideas! I've got them under control (sort of) by taking a multivitamin that contains potassium. My blood work showed I was a little low. I have some everyday. The ones in my hands are more of an annoyance. My fingers just cramp in various positions and I just wait for them to uncramp. My calves are usually where the most painful ones occur. I've just become very, very aware of what my muscles are doing and try to relax the muscle that is threatening to cramp. It works sometimes.

I'm still going to check out magnesium.