Facet dislocation and back spasms? Is this a thing people experience?

Hello everyone,

For a few years now, I will randomly experience muscle spasms in my mid to upper back. Usually, it is relatively mild, but on occasion it is severe and I am unable to stand up straight or correct my posture. The pain is extremely intense and radiates around my back and sometimes to my chest. Nothing really seems to make it better except sometimes for muscle relaxants like valium or clonazepam.

I was diagnosed with a marfanoid connective tissue disorder a few years ago, and a doctor had speculated that this may cause the facets in my spine to be somewhat "loose" and able to dislocate and pinch easier than normal. I was also told that this occasionally happens with otherwise healthy people as well. I have however haven't really been able to find much about this. I'm not sure if I'm just calling it the wrong thing or if this is something broader I don't know about. Doctors have not been super helpful and have just kind of said "this can happen" without any further explanation.

While I usually do not have this issue, when it does happen I am largely unable to move much and my torso contorts in a very unnatural way due to the muscles in my back going in to spasm. When I say spasm, it is not an alternating tight, then not tight, then tight kind of spasm, but rather the muscles will become painfully tight and stay that way. I would add that this usually happens in a similar spot to the left of my spine, a little above my ribs, but it can be hard to tell due to the radiating pain and it is not always this way.

I was wondering if anyone else has experienced this sort of thing or knows much about it. I'm kind of at a loss and would like to know more.

Thank you for reading, and I wish you all the best with your backs.