Blood in Urine: What Men Should Know – Cleveland Clinic

Note: This article is for educational purposes only and is not a substitute for medical care. If you notice blood in your urine, even once, get checked by a clinician. Your bladder is many things, but a fan of mystery theater it is not.

Seeing blood in your urine can feel like your body just sent you a very dramatic text message in all caps. And honestly, that is not far off. Blood in urine, called hematuria, can show up as a faint pink tint, a rusty tea color, a bright red surprise, or a lab result that says there is blood even though everything looked normal in the toilet. Sometimes the cause is relatively minor, like intense exercise or a treatable infection. Sometimes it points to stones, prostate trouble, kidney disease, or cancer. For men, the message is simple: do not shrug it off, do not blame the lighting, and do not wait for it to “probably disappear.”

This matters because men face a few extra twists in the urinary story. The prostate can enlarge with age and affect urine flow. Bladder cancer is also more common in men than in women, and smoking remains the biggest bladder cancer risk factor. That does not mean every red streak is a worst-case scenario. It does mean that playing detective in your bathroom is a bad long-term strategy.

What hematuria actually means

Hematuria simply means red blood cells are present in urine. There are two main types. Gross hematuria means you can see the blood. Microscopic hematuria means the blood is only found on testing. The American Urological Association definition for microhematuria is generally three or more red blood cells per high-power field on a properly checked urine sample. In plain English: even “invisible” blood still counts.

Another important detail: it does not take much blood to change urine color. A small amount can make urine look alarming, while some serious conditions cause only microscopic blood that you would never notice without a test. Also, not every red-looking bathroom moment is true blood. Certain foods and medicines can change urine color, which is exactly why proper testing matters more than visual guesswork.

Why men should pay closer attention

Men are more likely to develop certain conditions tied to hematuria, especially prostate enlargement and bladder cancer. The prostate sits just below the bladder and wraps around the urethra, so when it enlarges, it can slow urine flow, trigger urgency, and sometimes cause blood in the urine. Meanwhile, bladder cancer remains far more common in men. The American Cancer Society estimates about 64,730 new bladder cancer cases in U.S. men in 2026, compared with about 19,800 in women.

Smoking deserves its own paragraph because it is not a side character here. It is the major risk factor for bladder cancer. Tobacco-related chemicals enter the bloodstream, get filtered by the kidneys, and collect in the urine, where they can damage the bladder lining over time. Workplace exposure to certain chemicals can also raise risk, especially in jobs involving paint, dye, metal, petroleum products, plastics, leather, and similar industrial materials.

Common causes of blood in urine in men

1. Urinary tract infection

Yes, men get UTIs too. They are less common in men than women, but when they happen, they can cause burning, urgency, frequency, cloudy urine, and blood. Infection or inflammation can affect the bladder, kidneys, urethra, or even the prostate. The good news is that many infections are treatable. The less-good news is that untreated infection can climb upward and become a much bigger problem.

2. Kidney stones or bladder stones

Stones are the tiny mineral villains of the urinary tract. They can scrape tissue, block urine flow, and cause anything from mild discomfort to pain that makes a grown man bargain with the universe. Blood in the urine is a classic clue, especially when paired with flank pain, groin pain, nausea, or burning with urination.

3. Enlarged prostate or prostatitis

As men get older, benign prostatic hyperplasia, or BPH, becomes increasingly common. An enlarged prostate can squeeze the urethra, making it harder to start urinating, causing dribbling, nighttime bathroom trips, weak stream, urgency, and sometimes blood in the urine. Prostatitis, which is inflammation or infection of the prostate, can cause similar symptoms and can also make urination miserable.

4. Exercise, medication, or recent procedures

Sometimes hematuria appears after hard exercise, especially long-distance running or contact sports. Certain medicines, including aspirin, some blood thinners, penicillin, NSAIDs, and anticancer drugs, can also be linked to blood in urine. Recent urinary procedures, catheter use, or trauma to the kidneys or bladder can do it too. Temporary does not mean ignorable, though. If it happens, it still deserves a real medical look.

5. Kidney disease and less common systemic causes

Sometimes the bleeding source is not the bladder or prostate at all. It is the kidney itself. Conditions that affect the kidney’s filtering units, such as glomerular disease, can cause microscopic blood in urine and may also come with protein in the urine, swelling, or abnormal kidney function tests. Inherited disorders such as sickle cell disease or Alport syndrome can also be involved.

6. Cancer

This is the cause men worry about most, and for understandable reasons. Blood in urine can be an early sign of bladder cancer and may also appear with kidney, ureter, urethral, or prostate cancer. One tricky part is that the bleeding may come and go. It may be painless. It may happen once and then disappear for weeks. That is exactly why visible blood should not be brushed off just because it vanished before your appointment.

Symptoms that should make men move faster

Blood in urine deserves attention on its own, but some symptoms raise the urgency. Call promptly or seek urgent evaluation if blood shows up with fever, chills, nausea, vomiting, severe belly or back pain, painful urination, inability to urinate, or blood clots in the urine. Unexplained weight loss, one-sided back pain, or ongoing urinary changes also deserve serious attention because they can point to a more significant underlying problem.

One more point men often miss: painless bleeding is not reassuring. Kidney stones and infections often hurt. Some cancers may not, especially early on. So “it didn’t hurt” should never be your excuse for delay. Your bladder does not hand out gold stars for stoicism.

How doctors figure out what is causing it

The workup usually starts with history, symptoms, medication review, smoking history, and a urinalysis. Your clinician may ask whether the bleeding was visible, whether it came with pain, whether it happened after exercise, and whether you have urinary symptoms such as burning, urgency, weak stream, or nighttime urination. Men may also have a physical exam that includes prostate-related assessment when appropriate.

If blood is confirmed, additional testing depends on your risk factors and the suspected cause. That may include repeat urine testing, urine culture, blood tests to check kidney function, and imaging such as ultrasound, CT, or MRI. A cystoscopy, where a urologist uses a tiny camera to look inside the urethra and bladder, is a common part of evaluating hematuria, especially when doctors want to rule out tumors, stones, strictures, or obstruction.

If the concern is higher in the upper urinary tract, a ureteroscopy may be used to look farther up into the ureters or kidneys. And if kidney disease is suspected, doctors may look closely for protein in the urine, abnormal kidney labs, or sometimes even consider kidney biopsy in selected cases. Translation: the evaluation is not random. It is a roadmap based on your risk, age, symptoms, and test findings.

What treatment usually looks like

Treatment for hematuria is really treatment for the cause. A UTI may need antibiotics. Stones may pass on their own or require procedures to break or remove them. An enlarged prostate may be treated with medication or other interventions. Kidney disease may call for monitoring, blood pressure control, or specialist care. Cancer treatment depends on the type, stage, and location. And in some cases, after a full evaluation, no serious cause is found and doctors simply follow up over time.

If there are clots or blockage, treatment can become urgent because the bladder has to keep draining. In severe cases, doctors may need to remove clots, place a catheter, or use bladder irrigation after surgery or heavy bleeding. That is another reason not to “wait and see” when urine flow is slowing down or stopping.

What men should do right now if they notice blood

First, do not panic. Second, do not ignore it. Third, do not try to diagnose yourself from a search bar and one photo of beet salad you ate yesterday. Make an appointment promptly, and sooner if you have pain, fever, clots, trouble urinating, or repeated episodes. Be ready to tell your clinician when it started, what the urine looked like, whether it was painful, what medicines you take, whether you smoke, and whether you have a history of stones, infections, prostate problems, or kidney disease.

And if you smoke, let this be one more reason to quit. Smoking does not just affect the lungs. It is a major bladder cancer risk factor, and the urinary tract is very much part of that story. If your body waves a red flag, do not negotiate with the flag.

Experience-based scenarios men often relate to

The following experiences are composite, educational scenarios based on the kinds of patterns major U.S. medical sources describe. They are not individual patient testimonials, but they reflect the way hematuria often shows up in real life.

The “it was just once” guy: He notices pink urine on a Tuesday morning, blames dehydration, and then sees perfectly normal urine the next five times he goes. By Thursday, he has convinced himself it was a weird lighting situation. This is one of the most common traps. Blood in urine can come and go, especially when the cause is something like a stone moving around or a tumor that bleeds intermittently. The disappearing act does not make it harmless. In fact, the on-again, off-again nature of bleeding is one reason doctors still want men evaluated after a single visible episode.

The “I thought it was the gym” guy: He finishes a brutal run, sees red urine later that day, and assumes his workout deserves both a medal and a little harmless drama. Exercise-induced hematuria does happen, especially after endurance events or contact sports. But medical guidance is clear on one thing: visible blood still should not be written off without medical review. Exercise can be the explanation, but it should be the diagnosis after evaluation, not the excuse before it.

The “it must be my prostate” guy: Older men often notice urinary hesitancy, weak stream, dribbling, or frequent nighttime trips to the bathroom and assume an enlarged prostate explains everything. Sometimes it does. BPH is common, and it can be part of the picture. But blood in the urine should not automatically be filed under “just prostate stuff.” Men with prostate symptoms can also have stones, infection, bladder disease, or cancer. The point is not to fear every symptom. It is to avoid letting a familiar symptom hide a more important one.

The “it didn’t hurt, so I waited” guy: Pain makes people act. Painless bleeding often makes them delay. Unfortunately, that can be backward. Infections and stones are famous for pain, but bladder cancer can show up as painless bleeding, especially early on. Many men describe being more confused than alarmed because they felt fine otherwise. That confusion is understandable. It is also exactly why expert guidance keeps repeating the same message: painless does not mean safe.

The “I was embarrassed to talk about it” guy: Urinary symptoms are oddly effective at making adults revert to middle-school levels of awkwardness. Men may delay because discussing urine, clots, frequency, or weak stream feels uncomfortable. But urologists hear these stories all day, every day. To them, “I saw blood in my urine” is not shocking. It is useful information. The sooner that sentence gets said out loud, the sooner the cause can be found and handled.

The bottom line

Blood in urine is not a diagnosis. It is a sign. In men, that sign can point to infection, stones, prostate enlargement, kidney disease, medication effects, injury, or cancer. Some causes are minor. Some are not. What matters most is not guessing correctly from your bathroom. What matters is getting evaluated, especially if the bleeding is visible, recurrent, painless, associated with clots, or paired with urinary symptoms, fever, pain, or trouble peeing. A little vigilance now can save you a much larger problem later.