So uhhh I dunno how to explain this but I've got this problem. I have a pain in my sternum, lemme explain. I first noticed it in my senior year of HS and in 3rd period, it first started out as a throbbing pain then it turned into pain when I raise my pecs to stretch. I have to pop my sternum to relieve this pain. Please if anyone has an answer to this mystery and don't jokingly try to scare me, I really want an answer and have this pain disappear. Thank you for your time, be safe, make good decisions and have a great tomorrow.