Hematuria is the presence of blood in the urine. Whether the blood is visible only under a microscope or visible to the naked eye, hematuria is a sign that something is causing bleeding in the genitourinary tract which could be the kidneys, the ureters (tubes that carry urine from the kidneys to the bladder), the prostate gland (in men), the bladder, or the urethra (tube that carries urine from the bladder out of the body).
Bleeding may happen once or it may be recurrent. It can indicate different problems in men and women. Causes of this condition range from non–life threatening (e.g., urinary tract infection) to profoundly serious (e.g., cancer, kidney disease). Therefore, a physician should be consulted as soon as possible.
In many cases, blood in the urine is the only sign of a problem. In other cases, a variety of symptoms, such as the following, may be present.