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Esta página también está en Español: Piedras en los riñones — lo que dice la evidencia
A kidney stone is a hard piece of material that forms in the kidney from substances in the urine. It can be as small as a grain of sand or as large as a pearl.
Most kidney stones leave the body on their own, without a doctor's help. Sometimes, though, a stone does not pass. It can lodge in the urinary tract, block the flow of urine and cause intense pain.
When to see a doctor
These can be signs of a kidney stone that needs medical help:
- severe pain in your back or side that does not go away;
- blood in your urine;
- fever and chills;
- vomiting;
- urine that smells bad or looks cloudy;
- a burning feeling when you urinate.
Diagnosis and treatment
A doctor diagnoses kidney stones with urine tests, blood tests and imaging. A stone that will not pass on its own may need treatment, which can be done:
- with shock waves;
- with a scope passed through the urethra, the tube that carries urine out of the body;
- with surgery.
Sources
- MedlinePlus (U.S. National Library of Medicine): "Kidney Stones," with information from the National Institute of Diabetes and Digestive and Kidney Diseases.
Licencia: CC0 1.0 (dominio público) · Adaptado de medlineplus.gov
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