The answer on reddit courtesy of imaginelove615, commenting on the ‘how does it feel to pass a kidney stone’ subreddit:
My family gets these a lot and as true rednecks, we have a cure! First, you need supplies: a case of dark beer (Guinness Black works best), a gallon of cranberry juice, and a gallon of water.Call your friends and family for moral support. Chug a beer. Chug a glass of cranberry juice. Chug a glass of water. Repeat until you’re too drunk to feel and your bladder is about to burst. Go to the bathroom. If you hear something that sounds like a bb hitting a hubcap, congrats! If not, time to keep drinking.