Hi again Rach,
Unfortunately, I think you'll find that the tight chest feeling is a symptom reported in both hypo and hyper. It's so frustrating to completely understand the vast array of symptoms. Almost as bad as trying to understand the origins of the universe. The body is such an incrediably complex organism! But, if you're anything like me, I am bound and determined to understand it anyway.
I'd never thought of anxiety/adrenaline as the cause of the tight chest but it could be a very definite maybe. I think both hypers and hypos experience a lot of anxiety as a primary symptom compounded by having to deal with all the various symptoms. Could also have something to do with changes in oxygen levels, a bit like angina? I read something like that somewhere or another. But then again, doesn't anxiety cause a change in oxygen consumption? Here we go around in a circle again. Darn, that keeps happening
By the way, my hyper tight chest is kind of like something heavy sitting on it that I can't push off. I get the exact same feeling when my 60 lb lap-dog decides to jump in my lap and lean against my chest
Can't define it as pain, just a feeling that it's being pushed on. Coincidence that it was there after the doc drastically reduced my beta blocker (controls anxiety and improves oxygen consumption by blocking adrenaline) and then magically went away again when I got the dose right again?