My spasms are mild. I've get them in my ankles, feet, fingers, hands, wrists, calves and back. I can visualize what it feels like, but describing is hard. Most of my spasms are short and intense, it is like a tiny explosion. Like someone poked me with a large gauge needle and the muscle said "Hah!"

The spasms in my back are the worst. Those are full-on muscled spasms of the large muscles in my back.

I also get mild charley horses in my calves that can last for days. It just feels like you do after you have a sudden cramp in your leg that takes a while to go away, and then later your muscle just feels tight and sore.

Hope you feel better soon!