Costochondritus is a chronic inflammatory disease, as is COPD. While one probably doesn't necessarily cause the other, I suspect that they might very well go hand in hand and irritate each other. If you're having issues with one inflammatory disease, it's not unusual to have issues with another. I would definitely check with my pulmonologist to be sure that you're doing everything to help yourself with this bout of it.

I rely on May clinic information to answer some of my questions then follow up with the doc. Here's the site link that might help you https://www.mayoclinic.org/diseases-conditions/...

thanks for the link,it answered my question.