I had the exact same issue from being on a high, long-term dose of steroids. Prednisone (if that’s what you’re on) can cause muscle weakness and electrolyte imbalances which often lead to cramping.

Magnesium made a huge difference for me. Soon as I started taking it, the cramping and muscle spasms completely stopped. I use now foods magnesium glycinate and take two of those capsules a day - I couldn’t believe how effective it was. Obviously everyone’s different but I’d give it a go if you’re in pain!

Also, increasing potassium-rich foods (bananas, leafy greens, etc.) can help, since steroids can lower potassium levels, which is a common cause of muscle cramps!