I have been experiencing knots in the middle of my chest, it isn t painful but it almost feels like a joint that I can crack such as my fingers, and I have cracked it before with stretching. However lately I haven t been able to crack it and it occassionally bothers me when I work out, what is the cause of this and how can I relieve it?
Thanks for your question on Chat Doctor. I can understand your concern. In my opinion, you are mostly having Costco Chat Doctor.  It is inflammation of costal cartilage. It can give rise to knot feeling and also give rise to Crack sensations. So follow these steps for better symptomatic relief in Costco