Wow. I keep coming up with the serratus anterior muscle when i search to find out why my pain is so severe in my ribs. Also when searching for stretches for that area.
It's the outside of the ribs, from the armpit down. Not in the middle chest like Costochondritis. I find it impossible to wear bras, etc. It doesn't hurt to breathe, just when touched or if I lie on my side.
Most of my TOS pain is posterior shoulder pain, bilaterally. Thats how this whole mess began. Then went to spasms in my neck and traps, then arm turned numb. Ulnar nerve is numb in the whole arm.
I've never had much pain in the front of my neck or upper chest area. Mainly pain in upper back ,ribs, arms and hands. Mine is vascular, and neuro TOS.
Very interesting reading towelhorse. ihtos