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Blood in the Urine

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Around one in two people with ADPKD will get blood in their urine (haematuria) at some time. But it is particularly common in people with large kidneys and high blood pressure.

You should tell your doctor if you see blood in your urine, because repeated episodes are associated with reduced kidney function. Blood in the urine may also be a symptom of other problems affecting the urinary tract.

Blood in the urine may last for several days, or rarely for many weeks. It can be very worrying, but it usually clears up without medication.

Causes of blood in the urine

Blood is not naturally present in urine. In people with ADPKD, blood in the urine may be caused by:

  • Bursting of the cysts in the kidneys or of the small blood vessels around the cysts
  • Urinary tract infections
  • Kidney stones
  • Other problems that affect the urinary tract that may have nothing to do with your ADPKD.

Symptoms of blood in the urine

When you have blood in your urine, it may look pink, red or brown (when the urine is visibly coloured by the amount of blood, it is called macroscopic haematuria). Your urine may also contain small amounts of blood that are not visible to the naked eye. This is called microscopic haematuria.

Diagnosing blood in the urine

Microscopic haematuria may be found when your blood is tested routinely. Blood in the urine can be easily diagnosed even if it is invisible to the naked eye by using a special strip of paper (a urine test strip or urine reagent strip). The strip is dipped into a urine sample, and changes colour if blood is present.

You should tell your doctor if you see blood in your urine, because repeated episodes are associated with reduced kidney function. Even if your urine is obviously coloured (macroscopic haematuria), your doctor will still test it to make sure that blood is the cause. This is because urine can be stained by foods such as beetroot or blackberries, as well as some medications. Your urine will also look darker if you have not been drinking enough fluids and are dehydrated.

Treating blood in the urine

Once causes such as urinary tract infections or kidney stones have been ruled out, blood in the urine can be treated by:

  • Increasing your fluid intake. This will dilute your urine and reduce the risk of blood clots in your urinary tract. (But check with your doctor in case you have been advised to restrict fluids because of your kidney function).
  • Bed rest.
  • Paracetamol for pain. (Avoid non-steroidal anti-inflammatory drugs or NSAIDs such as aspirin or ibuprofen. They may make the bleeding last longer and may harm your kidneys.)

Preventing blood in the urine

You can reduce the likelihood of blood in your urine by:

Avoiding activities that seem to trigger or be associated with blood in your urine

Adopting lifestyle measures to reduce your risk of urinary tract infections or kidney stones.

Learn more

About ADPKD and high blood pressure

About urinary tract infections

About kidney stones

More information


The information on this page is under review by the PKD Charity using the accredited Information Standard process.

How to print this information: click the printer button top right for a printer-friendly version. However, if you don't have access to a printer and would like a printed version of this factsheet, or any other PKD Charity information, call the PKD Charity Helpline on 0300 111 1234 (weekdays, 10.00am-4.30pm) or email This email address is being protected from spambots. You need JavaScript enabled to view it.

PKD Charity Helpline:The PKD Charity Helpline offers confidential support and information to anyone affected by PKD, including family, friends, carers, newly diagnosed or those who have lived with the condition for many years.

Disclaimer: This information is primarily for people in the UK. We have made every effort to ensure that the information we provide is correct and up to date. However, it is not a substitute for professional medical advice or a medical examination. We do not promote or recommend any treatment. We do not accept liability for any errors or omissions. Medical information, the law and government regulations change rapidly, so always consult your GP, pharmacist or other medical professional if you have any concerns or before starting any new treatment.

Please send suggestions for improvement to This email address is being protected from spambots. You need JavaScript enabled to view it.

© PKD Charity 2014 | www.pkdcharity.org.uk
Registered charity No 1160970 / SC038279

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