What is Hematuria (blood in urine), and what causes it

Home / Bladder Medically Reviewed by Edith Anderson, RN
Hematuria is the presence of blood cells in the urine. Hematuria can be called either gross or microscopic.

Gross hematuria occurs when there is enough blood present in the urine that it is visible to the naked eye. It can turn toilet water a pale pink or bright red color.

Microscopic hematuria is a result of there being an amount of blood in the urine that can only be seen through a microscope.

Dipstick hematuria results when oxidation of the urine test strip causes a color change. It does not always mean that blood cells are present in the urine.

What are the causes of hematuria?

There can be a number of different causes of hematuria, some more serious than others. These conditions include, but are not limited to:
-Urinary tract infection (UTI)
-Pyelonephritis (UTI that has reached as far as the kidney)
-Urinary stone disease
-Enlarged prostate (benign prostatic hypertrophy)
-Injury to the urinary tract
-Kidney (renal) disease
-Sickle cell disease
-Bladder cancer
-Kidney cancer
-Prostate cancer
Please note that urine can also change colors due to food choices. Foods such as beets, blackberries, and rhubarb, as well as food with a lot of dyes, can cause your urine to change color.

What are the symptoms of hematuria?

Although blood in the urine is not always a significant symptom of disease, it can be an important warning sign to a possible health problem.

Bloody urine should never be ignored. Contact your doctor right away if there is blood in your urine, especially if you are also suffering from:
-Frequent, painful or urgent urination
-Nausea, vomiting, fever, or pain in your abdomen

How is hematuria treated?

The treatment of hematuria depends strongly on the actual cause of blood in the urine. The information collected from the medical history, physical exam, and any test results will be used to determine the best treatment option.

For hematuria that is caused by a UTI, for example, a common treatment is the use of antibiotics. These antibiotics work to kill the bacteria causing the UTI, which should stop the bleeding.

Who is at risk for hematuria?

People who are most likely to have blood in their urine are those with existing diseases that are known to cause hematuria, such as the ones listed in the section related to causes of hematuria. However, certain actions may increase a person’s chances of having blood in their urine. These include:

-Overuse of pain medications
-Exposure to certain chemicals
-Exposure to radiation
-Running or jogging for long distances
-Avoiding these actions may decrease the chances of having blood in your urine.