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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:

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Illustration of kidney stones in the calyces and ureter
Results 1 - 10 of 502 for kidney stones
  1. Kidney Stones (National Library of Medicine)  
    A kidney stone is a solid piece of material that forms in the kidney from substances in the urine. It ... sand or as large as a pearl. Most kidney stones pass out of the body without help from ...
  2. Kidney Stones Interactive Tutorial (Patient Education Institute)  
    Kidney Stones Introduction Kidney stones are fairly common. Although they can be very painful, they are treatable, and ... urinate. The urine is emptied through the urethra. Kidney Stones Kidney stones vary in size and shape. They ...
  3. Kidney Stones in Children From the National Institutes of Health (National Kidney and Urologic Diseases Information Clearinghouse)  
    ... of Topics and Titles : Kidney Stones in Children Kidney Stones in Children On this page: What is a ... Research For More Information Acknowledgments What is a kidney stone? A kidney stone is a solid piece of ...
  4. What I Need to Know about Kidney Stones From the National Institutes of Health Easy-to-Read (National Institute of Diabetes and Digestive and Kidney Diseases)  
    ... Kidney Stones What I need to know about Kidney Stones On this page: What is a kidney stone? ... Guide For More Information Acknowledgments What is a kidney stone? A kidney * stone is a solid piece of ...
  5. Diet for Kidney Stone Prevention From the National Institutes of Health (National Institute of Diabetes and Digestive and Kidney Diseases)  
    ... Titles : Diet for Kidney Stone Prevention Diet for Kidney Stone Prevention On this page: How does diet affect ... How does diet affect the risk of developing kidney stones? Kidney stones can form when substances in the ...
  6. Kidney Stones in Adults From the National Institutes of Health (National Institute of Diabetes and Digestive and Kidney Diseases)  
    ... of Topics and Titles : Kidney Stones in Adults Kidney Stones in Adults On this page: What is a ... Research For More Information Acknowledgments What is a kidney stone? A kidney stone is a solid piece of ...
  7. Kidney Stones: What You Need to Know From the National Institutes of Health (National Institute of Diabetes and Digestive and Kidney Diseases) - In English and Spanish  
    ... Titles : Kidney Stones: What You Need to Know Kidney Stones: What You Need to Know On this page: ... to get a kidney stone? What is a kidney stone? A kidney stone is a solid piece of ...
  8. Diet and Kidney Stones (National Kidney Foundation)  
    ... Disease A to Z Health Guide Diet and Kidney Stones If you have kidney stones, you may need ... necessary changes in your diet. What is a kidney stone? A kidney stone is a hard mass that ...
  9. Lowering the Chance of Getting Another Calcium Kidney Stone (Agency for Healthcare Research and Quality)  
    ... 2013 Lowering the Chance of Getting Another Calcium Kidney Stone Formats View PDF (PDF) 421 kB Download Audio ( ... this Web page. Understanding Your Condition What are kidney stones? Kidney stones are hard pebbles that form inside ...
  10. Kidney Stones in Children and Teens (American Academy of Pediatrics)  
    ... Stones in Children and Teens Health Issues Listen Kidney Stones in Children and Teens Article Body ​Kidney stones ... teen girls having the highest incidence. Types of Kidney Stones There are many different types of kidney stones ...
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