if it is serious, you should see a doctor, and you may need to use instruments.

It's not too serious. Doing exercises every day, strengthening abdominal muscles and generating binding force on the upper abdomen can improve the situation of rib inversion. It is useful to do more abdominal breathing at ordinary times.

Therefore, it is also good to practice abdominal muscles. Pay special attention to the training of abdominal oblique muscles. For example, if you roll your abdomen, turn your upper body sideways when you get up, and support it with a side plate.