These are pretty common in jiu jitsu, most common are rib fractures, intercostal strains or rib separations.
This program deals with rib injuries in general, but please talk to your doctor before starting.
Some of the exercises can be a bit uncomfortable, but they should never feel painful. If you’re feeling pain, make sure to back off and go back to an earlier video with more gentle exercises.
You can start with video #1 right away, as it’s very gentle and designed for early stages when breathing feels slightly painful.