Just because something is over the counter does not mean there are not side effects..google ADVIL, ASPRIN, TYLENOL and see what I mean..people also tend to take more. They kill your stomach, your liver, or your kidneys plus
God knows what else.

Yep ,
Arms
Wrists
Back
Boobs
Chest
Legs
Ankles everywhere

Mine is my back, shoulder, stomach, and legs. With my back, it’s bc it gets so tight. I ice it, heat it, and use a foam roller to massage it. With my shoulder, I ice it, heat it, and stretch it. My stomach and legs, I stretch. But, for me, it tends to be really bad for a few weeks, then settles down.

When they happen, quite painful. Neck, lower back, legs. I try to keep my fluids up as the spasms can happen with dehydration. I felt it's related to stress.

I use to get them all the time. It seem either repetitious use of muscles (like peeling potatoes) or resistance on the muscles (opening a tight jar) would trigger a spasm. I would have it on and off all that day and have to sit quiet. I started taking magnesium and I don't get them much any more. There's different forms of magnesium so do some research and experiment which works best for you. I take natural calm (magnesium carbonate). I hope it works for you. It's misable getting muscles spasms. Feel Better soon! ☺️