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Health Information Center


  • Cynthia M. Johnson, MA
Publication Type:



(Blood in the Urine—Adult)


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

There are two kinds of hematuria:

  • Microscopic hematuria—small amount of blood that people cannot see
  • Gross hematuria—enough blood to make urine appear red or tea-colored


Many things can cause blood to be in the urine, such as:

In some people, the cause is not known.

Risk Factors

Things that may raise the risk of this problem are:

  • Smoking
  • Taking certain medicines, such as antibiotics and pain relievers
  • A family history of kidney problems
Kidney Stone.

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A person with blood in the urine may have no other symptoms.

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


The doctor will ask about symptoms and health history. A physical exam will be done. A doctor who focuses on kidney or bladder problems may need to be seen.

To help find a cause, the doctor may do:

  • Urine tests
  • Blood tests

The organs in the pelvis and belly may need to be viewed. This can be done with:


Some people will not need treatment. Symptoms may go away on their own.

For others, treatment will depend on the cause. Medicine or surgery may be needed.


Prevention will depend on the cause.





  • Gross hematuria—approach to the adult. EBSCO DynaMed website. Available at: https://www.dynamed.com/approach-to/gross-hematuria-approach-to-the-adult.
  • Hematuria in children. National Kidney Foundation website. Available at: https://www.kidney.org/atoz/content/hematuria.
  • Hematuria in children—approach to the patient. EBSCO DynaMed website. Available at: https://www.dynamed.com/approach-to/hematuria-in-children-approach-to-the-patient.
  • Microhematuria—approach to the adult. EBSCO DynaMed website. Available at: https://www.dynamed.com/approach-to/microhematuria-approach-to-the-adult-28.
  • Urination problems. Family Doctor—American Academy of Family Physicians website. Available at: https://familydoctor.org/symptom/urination-problems.


  • Mary-Beth Seymour, RN
Last Updated:

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.