Many years ago I had a feeling as if there was arubber band around my waist and it lasted for several weeks. I've read that some people with MS experience this feeling. More recently, I had the same sensation but it was only for about 2 days and felt as if it was around my neck? Has anyone felt this?
IT sounds like spasticity -- and what is commonly called the "MS hug" -- like an even squeezing all around your torso..
or in any muscle group that bands around your body, like your neck, head, around your arm or leg (as opposed to the kind of spasticity that moves up and down the muscle, causing contractions in your leg, for example).
It can last for a brief time, like your 2 days or so...or for weeks...or, as in my case, "forever", since I was diagnosed 24 years ago. Sometimes it's worse, sometimes less intense, but always present (around my torso). I hope yours goes away soon.
...I am not a doctor, nor health professional, and don't pretend to be one, here.....