Should I worry about grinding under my shoulder after 3 posterior rib fractures?

Not necessarily. Can be inflammation in the bursa under your shoulder blade. Also if the shoulder blade is moving abnormally, then it will give you this feeling. Even if no pain right now, continued dysfunction can lead to pain . I would advise evaluation and possible some therapy to strengthen those Sapulpa muscles and therefore improve function and prevent further troubles.

Related Questions

How much should I rest with three posterior rib fractures?

6-8 weeks. I'm not quite certain if the term rest applies. Rib fractures are EXTREMELY PAINFUL. There is not much to do with these types of fractures but wait for them to heal. It takes at least 6 weeks to heal. Read more...
Comfort. In general, try to stay fairly active without aggravating your Pain. Patients with rib fractures that stay too sedentary run the trial of pulmonary complications. Read more...

Could my rib fractures cause shoulder bursitis?

It's possible. it could've change your mechanics of the way you use your shoulder. Another thought is that whatever caused the accident and the rib fractures could have also injured your shoulder and that is why you developed the bursitis. Read more...