If your urine is clear or yellow, you can be mellow. But other colors — as well as unseen qualities — can warrant a trip to the doctor.

With 20 million people in the U.S. and 10 percent of the population worldwide having some form of kidney damage, there is a long road ahead to...

The pain, says anyone who has had a kidney stone, is excruciating. Kidney stones are one of the most common disorders of the urinary tract. But...