I have spasms like that too - starts in the feet (they get distorted) and then moves up my leg to my butt. It is uncomfortable, if not painful sometimes.

Are you still sore today? I know that after that happens I'm sore for a day or 2. Maybe I have small spasms going on and don't realize.

I don't take the Baclofen for it. Although I have some on hand, I am trying to stay off as many medications as I can. I do however, take Epsom salt baths. These really, really help my sore muscles.

I hope you are starting to feel better today.