I just passed 6mm kidney stone - the stone itself travelled its way out for 2 months. It’s calcium oxidate based, so no chance of easy dissolving.. if it’s possible at all. I’ve had maybe about 4-5 days of strong, sometimes unbearable pain that I was taking painkillers for (without that much an effect..). Then few weeks of pain low down there.. Doctor wanted to give it a try for a “Via naturalis” passing, to which I agreed (no regrets). I have few more stones, with smaller sizes now... My doctors always recommended me beer with some lemon in it. Once in the past, I passed a kidney stone for less than 24h of the first pain (about 4mm) right after drinking 3 liters of beer. This whole thing sucks.