I have chronic costo and it affects my sternum, ribs and breast tissue. It also affects my diaphram bones and lately the skin on my abs. It's sore and burns. I'm not sure if the ab pain is from coughing or the muscle movement when having a BM. All I know is that I'm in a flare again. Wondering if this is all from the costo or a combination of fibrous tissue pain. It's not my gallbladder - had that out 5 years ago. Just curious where you all get your pain during a costo flare.