Blood in Urine

Blood in the urine is also called hematuria. Normally, urine does not contain blood. There are two kinds of hematuria:

  • Causes

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

    • Injury to the abdomen, pelvis, or internal organs of the urinary tract
    • Vigorous exercise—resolves with rest
    • Urinary tract infection
      or kidney infection

    • Cancer of the
      , or
    • Kidney disease
    • Kidney stones

    • Bleeding disorders such as

    • Certain congenital diseases such as
      polycystic kidneys
    • Radiation
      of the pelvis for cancer treatment
    • Certain medications

  • Definition

    Blood in the urine is also called hematuria. Normally, urine does not contain blood.

    There are two kinds of hematuria:

    • Microscopic hematuria—Urine contains a small amount of blood, which is not visible to the naked eye
    • Gross hematuria—Urine is visibly discolored by blood, appearing red or tea-colored

  • Diagnosis

    Your doctor will ask about your symptoms and medical history. A physical exam will be done. You may be referred to a neprhologist who specializes in kidney disease or a urologist who specializes in the urinary system.

    Your doctor may need to test your bodily fluids. This can be done with:

    • Urine tests
    • Blood tests

    Your doctor may need to view your bodily structures. This can be done with:

    • X-ray
    • Ultrasound
    • CT scan
    • MRI scan
    • Cystoscopy

  • Prevention

    Treating the underlying condition that causes hematuria may help prevent it from occurring.

  • Risk Factors

    Risk factors include:

    • Smoking
    • Medications such as certain antibiotics and pain medications
    • Recent upper respiratory tract infection
    • Family history of kidney problems
    Kidney Stones Can Cause Microscopic Hematuria
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  • Symptoms

    In some cases, there may not be additional symptoms.

    But, if you have an underlying condition, you may have other symptoms. For example, kidney stones can cause blood in the urine, along with pain in the side, abdomen, or groin.

  • Treatment

    Treatment will depend on the cause of hematuria. Some causes of hematuria require no treatment or will resolve on their own. Other causes will respond to medication. For example, treating a urinary tract infection with antibiotics will stop the hematuria. Still, other causes may require surgery, such as the removal of a tumor or treatment for
    prostate cancer