6 Signs and Symptoms of Kidney Stones

Kidney stones are solid, crystalline masses that your body eliminates via the urinary tract. Learn the signs and symptoms of kidney stones so you know when to seek treatment.
Different sizes of kidney stones passed from one person.
Source: iStockphoto
Reviewed by Charles Patrick Davis, MD, PhD on August 20, 2013

What Are Kidney Stones?

Kidney stones are pieces of solid material that form when normally dissolved substances in the urine become highly concentrated. They are often made from calcium, oxalate, and phosphate. Kidney stones may be just a few millimeters in diameter or as large as a small rock.

About 10% of people will get a kidney stone in their lifetime. Kidney stones are most common in men, but doctors are now seeing more cases of kidney stones in women and children. Dietary factors may play a role in the increased rates of kidney stones.

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