Is It Normal to See Blood in Urine? What It Could Mean
You go to the bathroom as usual and notice something unexpected; your urine looks pink, red or unusually dark.
The first thought is often: “Why is there blood in my urine?”
Seeing blood in urine can be alarming, but it does not automatically mean something serious. A urinary infection, kidney stone or prostate problem may be responsible. In some people, however, hematuria can be a condition that needs further investigation. That is why visible blood should not simply be ignored. [1][3]
Key takeaways
- Blood in urine is called hematuria.
- It may be visible or found only during a urine test.
- Common blood in urine causes include urinary infections, kidney stones and prostate-related conditions. [1][3]
- Kidney disease and urinary tract cancers are other possible causes. [1]
- Even one episode of seeing blood in urine should be discussed with a doctor. [1]
- Many people who are investigated do not have a serious underlying problem. [3]
What does blood in urine mean?
Hematuria means that red blood cells are present in the urine.
There are two main types of hematuria:
| Type | What it means |
|---|---|
| Visible hematuria | You can see the blood in the urine. Urine may look pink, red, dark red or brown. |
| Microscopic hematuria | The urine looks normal, but blood is detected during testing. |
Visible hematuria is also called gross or macrohematuria. Even a small amount of blood can noticeably change urine colour. [1]
What could be causing it?
Blood can be from the kidneys, ureters, bladder, prostate or urethra. [1]
Urinary infection
Urinary bladder and urinary tract infections are among the recognised causes of hematuria. You may also notice burning, urgency, or a need to urinate more often. [1][3]
Kidney or urinary stones
Stones can irritate the urinary tract and cause bleeding while urinating. Pain in the side or back may occur as well sometimes. [1]
Prostate problems
In men, an enlarged or inflamed prostate can sometimes cause bleeding into the urine, particularly with increasing age. [1]
Kidney conditions
Some kidney diseases can allow red blood cells to leak into the urine. Doctors may assess kidney function and check for protein or other abnormalities in the urine when a kidney-related cause is suspected. [1]
Could it be cancer?
This is often the biggest worry.
Blood in urine does not mean you have cancer.
However, urinary bladder and other urinary tract cancers are among the conditions doctors consider, particularly when risk factors such as increasing age, smoking history or recurrent visible hematuria are present. [1]
What your symptoms may suggest
| What you notice | What your doctor may consider |
|---|---|
| Blood with burning or urgency | Urinary infection |
| Blood with side or back pain | Urinary stone |
| Blood with urinary difficulty in men | Prostate-related cause |
| Blood found only on a urine test | Microscopic hematuria |
| Visible blood with no pain | Still needs evaluation |
| Visible blood that keeps returning | Further urology review is important |
These patterns can provide clues, but they cannot confirm the cause on their own. [1,2]
“It happened only once. Do I still need to get checked?”
Yes.
Visible hematuria suggests medical assessment even if the urine returns to its normal colour. The 2018 clinical review by Bolenz and colleagues states that macrohematuria requires investigation. [1]
It is also important to seek review if visible blood returns after previous normal tests. In a 2024 study of 573 patients with initially normal hematuria investigations, the urothelial cancers later detected occurred in patients who returned with visible hematuria. The authors concluded that recurrent visible hematuria requires re-investigation. [2]
What happens when you see a urologist?
The exact tests depend on your symptoms, age, medical history and risk factors.
or
No concerning finding → reassurance/follow-up
A cystoscopy allows the urologist to look inside the urinary bladder using a thin flexible telescope passed through the urethra. Ultrasound and CT scans help examine the kidneys and urinary tract. [1][3]
What if all the tests are normal?
That can happen.
The York and Scarborough NHS patient leaflet notes that for the great majority of patients investigated for hematuria, no cause is ultimately found. In those cases, testing can provide reassurance that no further action is needed at that time. [3]
If visible blood returns later, however, tell your doctor rather than assuming the previous tests still explain it. [2]
FAQs
The bottom line
Seeing blood in urine can be frightening, but colour alone cannot tell you what is causing it.
It may be something treatable, such as an infection or stone. Sometimes investigations find nothing concerning. What matters is finding out why the bleeding happened rather than ignoring it.
If you notice blood in your urine, Athaayu Uro Care can help you find out what may be causing it, whether you need any further tests, and what the next step should be.
References
- Bolenz C, Schröppel B, Eisenhardt A, Schmitz-Dräger BJ, Grimm MO. The Investigation of Hematuria. Dtsch Arztebl Int. 2018;115:801–807. doi:10.3238/arztebl.2018.0801.
- Thompson A, James B, David R, et al. Urothelial Malignancy After Normal Hematuria Clinic Investigations: Does Non-visible Hematuria Need Re-investigation? Urol Res Pract. 2024;50(2):102–106. doi:10.5152/tud.2024.23025.
- York and Scarborough Teaching Hospitals NHS Foundation Trust. Blood in the Urine (Haematuria): Information for patients, relatives and carers. Patient Information Leaflet PIL1079. Version 4. March 2026.