How to Pass Kidney Stones Quickly With This Natural Remedies. The most important thing you can do for your kidney health is to take care of your body to reduce your chances of developing diseases that put a strain on your kidneys. To prevent kidney stones, you need to know what caused your kidney stone. It is a solid piece of material that forms in a kidney when substances that are normally found in the urine become highly concentrated. Kidney stones are caused by high levels of calcium, oxalate, and phosphorus in the urine.