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Kidney Stones

A kidney stone is a solid piece of material that forms in the kidney from substances in the urine. It may be as small as a grain of sand or as large as a pearl. Most kidney stones pass out of the body without help from a doctor. But sometimes a stone will not go away. It may get stuck in the urinary tract, block the flow of urine and cause great pain.

The following may be signs of kidney stones that need a doctor's help:

  • Extreme pain in your back or side that will not go away
  • Blood in your urine
  • Fever and chills
  • Vomiting
  • Urine that smells bad or looks cloudy
  • A burning feeling when you urinate

Your doctor will diagnose a kidney stone with urine, blood, and imaging tests.

If you have a stone that won't pass on its own, you may need treatment. It can be done with shock waves; with a scope inserted through the tube that carries urine out of the body, called the urethra; or with surgery.

Source: National Institute of Diabetes and Digestive and Kidney Diseases


The OSU Comprehensive Kidney Stone Program is available to prevent, treat and manage kidney stones. The program offers surgical and non-surgical treatment options using the most advanced equipment including intraoperative, latest-generation endoscopy as well as lithotripter and laser technology. It provides patients with a full range of kidney stone treatments, and a continuum of care, through its metabolic clinic. The clinic helps determine and treat the underlying causes of kidney stones and assists patients with their long-term management. Bodo Knudsen, MD, a urologist with expertise in kidney stone management and lithotripsy, leads the program.

To schedule an appointment or for more information, please call the OSU Comprehensive Kidney Stone Program at (614 293-9349 or our Department of Urology at (614) 293-8155.