Blood in Urine (Hematuria): Causes & When to See a Urologist

Few things frighten a patient more than seeing blood in their urine — and rightly so, it should never be brushed aside. As a urologist, let me give you the single most important message of this article right at the start: blood in the urine should never be ignored, not even once, and not even if there’s no pain. Very often the cause turns out to be something treatable, but sometimes blood in the urine is the only early warning sign of a serious condition — which is exactly why it must always be checked. In this guide, I’ll explain the causes, what the colour means, and precisely when to see a specialist.

What is hematuria?

Hematuria is simply the medical word for blood in the urine. It’s common — around one in five people seen by a urologist have it. There are two types: gross (visible) hematuria, where you can actually see the blood, and microscopic hematuria, where the blood is only detectable under a microscope, usually found during a routine urine test.

What does blood in urine look like?

With visible hematuria, your urine may turn pink, red, or brown (cola-coloured). It’s worth knowing that even a tiny amount of blood can dramatically change the colour of urine, so the amount you see doesn’t necessarily reflect how serious the cause is. Microscopic hematuria, by contrast, causes no visible change at all — which is why routine urine tests matter.

Common causes of blood in urine

There are many possible causes, and several are relatively benign and easily treated:

• Urinary tract infections (UTIs)
• Kidney or bladder stones
• An enlarged prostate (BPH) in older men
• Strenuous exercise or injury to the urinary tract
• Certain medications, such as blood thinners
• Kidney infections or inflammation

Serious causes you shouldn’t ignore

This is why I never take hematuria lightly. Blood in the urine can be the first — and sometimes only — sign of bladder cancer, kidney cancer, or, less commonly, prostate cancer. In fact, painless visible blood in the urine is the most common way bladder cancer is first detected. A hallmark of bladder cancer is that the bleeding may come and go — appearing one day, vanishing the next — but it always returns. Please don’t be reassured just because it stopped.

Painless vs painful blood in urine

Here’s a distinction we urologists pay close attention to. Somewhat counter-intuitively, blood in the urine with pain or burning is often less worrying — it’s usually caused by something like a UTI or a kidney stone. Painless visible blood in the urine is the bigger red flag, because it’s more likely to point to a tumour. Either way, both need evaluation — but painless bleeding especially must never be delayed.

Why you should never ignore it

I’ll repeat this because it saves lives: even a single episode of blood in the urine deserves a check-up, and so does bleeding that clears up on its own. Women, in particular, sometimes dismiss it as a UTI or their period — but it can be the only sign of a serious bladder problem. And smokers are at higher risk of bladder and kidney cancer, so they need especially careful evaluation, even for microscopic blood.

When should you see a urologist?

Please see a urologist as soon as possible if you notice any visible blood in your urine, or if a urine test shows microscopic blood. Seek urgent care — including our 24×7 emergency service — if the bleeding comes with severe pain, fever, an inability to urinate, or blood clots. Blood in the urine truly cannot be evaluated over the phone or by guesswork; it needs a proper specialist assessment.

How is it diagnosed?

Finding the source is a careful process. I typically start with a urinalysis and blood tests (to check for infection and kidney function), followed by imaging such as an ultrasound or a CT urogram to examine the kidneys and urinary tract. The key test is often a cystoscopy — a quick look inside the bladder and urethra with a thin camera, which allows me to detect stones, tumours, or other sources of bleeding directly.

A note on what’s not blood

Occasionally, red or dark urine isn’t blood at all. Beetroot and certain foods or medications can tint urine red, and dehydration makes urine darker and more concentrated (but that isn’t blood). Still, my advice is simple: if you’re unsure, get it checked. It’s always better to be certain.

Expert evaluation at Dr. Sunil Mhaske’s clinic

If you’ve noticed blood in your urine, please don’t wait and hope it passes. With advanced diagnostic facilities including cystoscopy, imaging and laboratory testing, over 13 years of experience, and 24×7 emergency urology care, I can find the cause quickly and treat it effectively — at my clinic in Pimpri Chinchwad, serving Pimple Saudagar, Pimpri and Pune.

📞 Book a consultation: +91 80874 93346 · Dr. Sunil Mhaske, Urologist — Pimpri Chinchwad, Pune

Frequently Asked Questions

1. Is blood in urine always serious?
   Not always — common causes include UTIs and kidney stones. But because it can be the only sign of a serious condition like bladder cancer, it should never be ignored and always needs evaluation.
2. Why is painless blood in urine more concerning?
   Painless visible blood is more likely to indicate a tumour, whereas blood with pain is often due to a UTI or stone. Both need checking, but painless bleeding especially must not be delayed.
3. What causes blood in urine in males?
   Common causes include UTIs, kidney or bladder stones, and an enlarged prostate. More serious causes include bladder, kidney, or prostate cancer, so evaluation is essential.
4. What causes blood in urine in females?
   UTIs and kidney stones are common causes. Women should not assume it’s just a UTI or menstruation, as it can occasionally signal a serious bladder condition.
5. Should I see a doctor if the blood in urine went away?
   Yes. Bleeding that stops does not mean the cause is gone — with some conditions it comes and goes but returns. Always get it evaluated by a urologist.
6. Can dehydration cause blood in urine?
   No. Dehydration makes urine darker and more concentrated, but that isn’t blood. Foods like beetroot can also tint urine red. If unsure, get it checked.
7. What tests are done for blood in urine?
   Typically a urine test, blood tests, imaging (ultrasound or CT), and often a cystoscopy — a quick camera examination of the bladder — to find the exact source.