Brad, here ya go.(and anyone else interested)
Here is a couple surgical photos of my joint showing the calcium deposits in the joints. Doesn't require much imagination to understand results of that crap rubbing against tendons and nerves. Ouch!
This is after cleaning it out. You can see inflammation. I have no concept of the orientation of these photos but you can clearly see the joint cleaned of that nasty calcium deposits.
Anyway, that gives some idea. Clearly not the intent of "let's post some photos" but for those of you who are active, and everyone on this forum is, especially those middle age dudes, be aware of pain and if it steadily increases, don't ignore it.
And you younger guys, take care of your joints while you can. "No pain, no gain" is BS. Use your head or you may end up paying later on. There's ways to stay in shape without damaging yourself.