Definition

Hematuria is blood in the urine. Normally, urine does not contain any blood.

There are 2 kinds of hematuria:

  • Microscopic hematuria—small amount of blood that is not visible to the naked eye
  • Gross hematuria—enough blood to make urine appear red or tea-colored

Causes

In some cases, the cause of hematuria is never found. The full list of known causes is lengthy. Some of the more common causes include:

Risk Factors

Factors that may increase your risk of hematuria include:

  • Smoking
  • Medications such as certain antibiotics and pain medications
  • Family history of kidney problems

Kidney Stone

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Symptoms

You may not have any other symptoms.

You may also have symptoms related to the cause. For example, kidney stones can cause pain in the side, belly, or groin.

Call your doctor any time you notice blood in your urine.

Diagnosis

You will be asked about your symptoms and health history. A physical exam will be done. You may be referred to a specialist.

To help find a cause, your doctor may do:

  • Urine tests
  • Blood tests

Images of your pelvic and belly structures may be taken with:

Treatment

Treatment will depend on the cause. Some will not need treatment. Symptoms may also resolve on their own.

Other may need medicine or surgery.

Prevention

Prevention will depend on the cause.