DefinitionBy Mayo Clinic staff
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Kidney stones (renal lithiasis) are small, hard deposits that form inside your kidneys. The stones are made of mineral and acid salts. Kidney stones have many causes and can affect any part of your urinary tract — from your kidneys to your bladder. Often, stones form when the urine becomes concentrated, allowing minerals to crystallize and stick together.
Passing kidney stones can be quite painful, but the stones usually cause no permanent damage. Depending on your situation, you may need nothing more than to take pain medication and drink lots of water to pass a kidney stone. In other instances, surgery may be needed. Your doctor may recommend preventive treatment to reduce your risk of recurrent kidney stones if you're at increased risk of developing them again.
- Worcester EM, et al. Nephrolithiasis. Primary Care: Clinics in Office Practice. 2008;35:369.
- Kidney stones in adults. National Institute of Diabetes and Digestive and Kidney Diseases. http://kidney.niddk.nih.gov/kudiseases/pubs/stonesadults/index.htm. Accessed Jan. 18, 2012.
- Diet for kidney stone prevention. National Institute of Diabetes and Digestive and Kidney Diseases. http://kidney.niddk.nih.gov/kudiseases/pubs/kidneystonediet/index.htm. Accessed Jan. 18, 2012.
- Rakel D. Integrative Medicine. 2nd ed. Philadelphia, Pa.: Saunders Elsevier; 2007. http://www.mdconsult.com/das/book/body/177428112-2/0/1494/0.html. Accessed Jan. 19, 2012.
- Curhan GC, et al. Diagnosis and acute management of suspected nephrolithiasis in adults. http://www.uptodate.com/home/index.html. Accessed Jan. 26, 2012.
- Preminger GM, et al. The first kidney stone and asymptomatic nephrolithiasis in adults. http://www.uptodate.com/home/index.html. Accessed Feb. 27, 2012.
- Humphreys MR (expert opinion). Mayo Clinic, Phoenix, Ariz. Feb. 20, 2012.
- Anderson CF (expert opinion). Mayo Clinic, Rochester, Minn. Feb. 8, 2012.