Blood in the Urine: What It Can Mean for Bladder Health

Why this matters

Seeing blood in your urine—called hematuria—can be frightening. Sometimes it has a simple explanation, like a urinary tract infection. Other times, especially in adults over 35, it can be an early sign of bladder cancer or another urinary tract problem. The key message: don’t ignore it. Even if it happens once and goes away, it deserves medical attention.

What is hematuria?

Hematuria means red blood cells are present in the urine. It can appear in two ways:

Visible (gross) hematuria: The urine looks pink, red, or cola-colored.
Microscopic hematuria: Blood is found only on a urine test under a microscope.

According to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), both forms can signal issues anywhere along the urinary tract—including the kidneys, ureters, bladder, or urethra.

Common causes of blood in the urine

Not all hematuria is cancer. Common causes include:

Urinary tract infections (UTIs)
Kidney stones
Enlarged prostate (in men)
Recent vigorous exercise
Certain medications, such as blood thinners

However, the Centers for Disease Control and Prevention (CDC) notes that bladder cancer is one of the most common cancers in the United States, particularly among older adults and people who smoke. Blood in the urine is often the earliest symptom.

Bladder cancer risk in the United States

Bladder cancer is more common in men than women and typically affects adults over age 55. Smoking is the single biggest risk factor, accounting for roughly half of cases, according to the CDC. Exposure to certain workplace chemicals—such as those used in dye, rubber, leather, and manufacturing industries—can also increase risk.

Other factors include:

Long-term bladder inflammation
Prior radiation therapy to the pelvis
Certain chemotherapy drugs
Family history

Importantly, not everyone with bladder cancer has pain. Many people feel completely well aside from noticing blood in their urine.

How doctors evaluate hematuria

When someone reports blood in the urine, clinicians typically begin with a repeat urine test and a review of symptoms and medical history. Depending on age and risk factors, further testing may include:

Imaging such as a CT scan or ultrasound to look at the kidneys and urinary tract
Cystoscopy, a procedure where a thin camera is inserted into the bladder
Urine cytology, which checks for abnormal cells

Evaluation recommendations are based on risk. For example, adults over 35 to 40, smokers, and those with visible blood are generally considered higher risk and may need more thorough testing. Younger adults with a clear infection may only need follow-up testing after treatment.

What about routine screening?

For people without symptoms, major U.S. organizations do not recommend routine screening for bladder cancer in the general population. That’s because current screening tests have not been shown to clearly reduce deaths from bladder cancer in low-risk individuals. Instead, the focus is on evaluating symptoms promptly and reducing risk factors—especially smoking.

Prevention and everyday steps

While not all bladder conditions can be prevented, some steps reduce risk:

Don’t smoke. Quitting lowers bladder cancer risk over time.
Stay hydrated. Drinking enough fluids may dilute harmful substances in urine.
Use workplace protections if exposed to industrial chemicals.
Seek prompt care for urinary symptoms like pain, urgency, or persistent infections.

When to seek medical care

Contact a clinician promptly if you notice:

Red or brown urine
Persistent urinary urgency or pain
Back or flank pain with urinary symptoms
Blood in urine along with fever or clots

Even if the blood appears only once, it should be evaluated. Early assessment can rule out serious causes—or catch them at a more treatable stage.

Access and insurance considerations

Most insurance plans, including Medicare, cover medically necessary evaluation of hematuria, including imaging and cystoscopy. However, out-of-pocket costs can vary depending on deductibles and facility fees. If cost is a concern, ask your provider’s office about billing estimates or financial assistance programs before testing.

What remains uncertain

Researchers continue to study better, less invasive urine-based tests to detect bladder cancer earlier and reduce unnecessary procedures. Some molecular urine tests are available, but their role in routine evaluation is still evolving, and they are not yet standard first-line screening tools for people without symptoms.

What this means for readers

Blood in the urine is not something to watch and wait on. In many cases, the cause is treatable and not life-threatening. But because it can be an early sign of bladder cancer—especially in older adults and people with a history of smoking—it deserves timely medical evaluation. Paying attention to urinary symptoms and reducing modifiable risks, like tobacco use, are practical steps that protect long-term bladder health.

This article is for general informational purposes only and is not medical advice. Research findings can be early, limited, or subject to change as new evidence emerges. For personal guidance, diagnosis, or treatment, consult a licensed clinician. For current outbreak or public health guidance, follow your local health department, the CDC, or another relevant public health authority.

Sources

Centers for Disease Control and Prevention (CDC) – Bladder Cancer
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), NIH – Hematuria (Blood in the Urine)
National Cancer Institute (NIH) – Bladder Cancer Treatment and Risk Factors