Hi Grayman, welcome to HW. Nice to meet you, but sorry to see you, if you see what I mean.
I've heard that it is pretty much random, in my case some of them dissolved by themselves (really tiny ones) and the bigger (but still tiny) one was diagnosed after
it came out. I was not given any medication or help, except - would you believe ! - they gave me a packet of narcotic painkillers to take away "just in case".
Sheesh, there are people here who are just about
dying for those but cannot get them. Not that I would have turned it down - fastest way I ever found to break sweat head to toe instantaneously is passing a kidney stone.
I would guess that someone else with more experience will be along shortly to give better informed advice.