Crepitus: You would possibly see a grinding or crackling feeling that will arise when relocating the knee, a result of the roughened bone surfaces rubbing towards one another. Crepitus may also take place with movement pain.  (OCD), a problem wherever a bit in the cartilage along with the layer of https://www.theorthopaedicandpainpractice.com/what-are-cartilage-lesions/