Zocdoc › Answers › Are sternums supposed to crack? Question. Are sternums supposed to crack?. About three years ago my sternum just started cracking. *VOLUME UP* a few clips of my cracking/popping chest/sternum. if you. Sternum Popping. Here's what happens to your knuckles when you crack them. Is Your Sternum Popping, Breastbone Cracking?. This is normal and it happens to all. Hi I broke my sternum accidentally a month ago and have been evaluated by. What causes the chest bone to crack? (like when you crack your knuckles/back)? My Sternum is cracking!!!. Does The Breastbone (Sternum) Crack ?. again and I would attempt to crack my sternum again. I know this isn't normal as it just. I can crack my sternum. i dont know why, its solid bone, but i can push on it, and hear a cracking sound, but its like a wet crack, not just a normal finger crack. Cracking, Clicking Sternum (Breastbone) Rib Joint Popping, Cracking, Clicking Sternum (Breastbone. sometimes I get this sharp stiff pain on my sternum i. Is this normal. Yup, same thing. Except for the laying on the side thing. It happens pretty much any time I reach for something.basically any time I stretch my. use the following search parameters to narrow your results: subreddit:subreddit find submissions in subreddit author:username find submissions by username I can crack my sternum, is this okay?. Well, I do a lot of yoga and I can crack my sternum too. Seeing as it doesn't hurt, I figure it can't be doing much harm.