Osteoarthritis

This is the type of arthritis which is the result of thinning of the joint cartilage.

Although it is typically thought of as being the result of 'wear and tear' - like for people who did a lot of sports: the current science shows we should think of it as wear and repair. This basically means 'use it or lose it'. Although, somewhat obviously, there's a sweet spot to be reached.

No all arthritis is painful and in answer to the question "do I need surgery for arthritis" - the answer is a resounding 'no' (plus a "not necessarily...)