When the cartilage at the ends of wrist bones wears away, the bones may rub together, creating friction and swelling. A person may also experience pain because the exposed bone has nerve endings.

Movement in any direction, especially rotation, was agony ... conventional treatment was to fuse the bones in the wrist together so the ends don’t rub. I’ve always been a keen motorcyclist ...

A layer of cartilage normally acts as a cushion between bones that meet in a joint, but its breakdown, often from basic wear and tear over time, lets the bones rub together, causing the pain of ...