Before you call your friend who just got diagnosed with a kidney stone and give him the good news, be aware that this unique treatment is appropriate for only certain kinds of kidney stones. Stones that are larger than seven millimeters (mm) in diameter (a little more than one-quarter inch) are less likely to pass on their own, and those over 10 mm almost never do. These larger stones are generally treated with extracorporeal shock wave lithotripsy, in which shock waves from outside the body are targeted to the stone (or stones) to break it up so it can pass.

In this study, the average stone size was about 5 mm. These men also had stones on the lower end of the ureter—the tube that runs from the kidneys to the bladder. Kidney stones stuck in the middle of the ureter do pass on their own, but slightly less often, on average, than those lower down. - See more at: http://www.betterhealth.com.ng/2015/08/the-mans-sex-cure-for-kidney-stones.html#more