How do i know that i have a fractured rib?

Easy to break a rib!: If you've had an injury that puts unusual force against a rib, you may be able to feel a very tender spot at the point of fracture. An xray can confirm a fracture. Often, however, you don't see the fracture initially - but a little while later, after new bone has formed around the fracture site. You often don't do much - other than comfort measures - as the broken rib heals...About six weeks!