I pranged one shoulder (decades ago now) playing hockey on astroturf [I learned the hard way; a synthetic fabric shirt sleeve can practically weld itself to the astroturf instead of sliding; that's what did the damage...]. Anyway my shoulder popped out, I had about three seconds of the worst pain ever, and then two things happened; my shoulder popped back in again and my endorphin system kicked in. I literally didn't know what was going on I had so many endorphins in me. I was lucky because the shoulder popped back in quickly, i.e. before there was any real swelling.
My shoulder was pretty sore for some weeks and I was advised to wear a sling until the soft tissues had mostly healed. I didn't feel at all like not wearing the sling, to start with anyway.
Anyway as others have said there is always some permanent damage and the damage means a recurrence is more likely. If you don't get a recurrence then the risk reduces over time but it is never as low as it would be for a shoulder that had never popped out. I again have been lucky, it never popped out again, but that shoulder still isn't as strong as the other one, and tends to ache in cold weather.
One of my acquaintances dislocated both shoulders so often that they came out far too easily; so much so that they would dislocate in rather everyday circumstances. He elected to have surgery and this did fix them, but he recovered slowly and for a long while he was wondering if he'd done the right thing or not.
cheers