Hi, Ralph, welcome to NT!

What you are describing sounds a lot like what is called the "MS Hug" or the "Girdle Sensation". If you do a search for those terms, you'll find discussions all over the net about it.

Ralph, I have returned to this post to add that I should have mentioned that I've never heard of this lung density issue as directly related to MS. Definitely ask your neuro if these are two separate things or if he/she thinks they are related. Sorry for any confusion.

I hope you get some answers and treatment quickly, it's very uncomfortable to feel that way.