Me. I have this. I’m getting treated for it
It’s the biggest muscle of your body, wrapping around and from neck to waist
Latissimus dorsi muscle
Google it
My rotator cuffs are sore too
I’m getting treated by physio and chiro and massage to that area. Relieved me greatly

Yes I agree with Lorraine14. I went to the er twice before they diagnosed me with costo..it is another symptom that we get with fibro. It is very painful when it flares up. I use ice and ibuprofen to help bring down the inflammation. I hope you feel better soon. Hugs

I get it sometimes it used to be so horrible I would get a toradol shot now accupuncture seems to help..yes I skip the bra because it causes me discomfort

Yes all the time. I just noticed the other day when I read about someone else not being able to wear a bra because the feel of it just hurts that sometimes it really does! I get a lot of pain where you say yours is and right in the center where my sternum is. Heat and some people have suggested vapor rub for pain. Gentle hugs.

I have this exact thing. Was one of my first painful fibro symptoms when I first started with pain in 2017. I still have it. I go through periods where it bothers me and other times I don’t notice it. But I can touch my rib cage in multiple places including around shoulder blade and have that bruised feeling. Had multiple chest X-rays shows nothing. Nope you can find some relief.