The most common first sign of bladder cancer is blood in the urine, called hematuria, and it can appear anywhere on a color range from orange or pink to dark red. The American Cancer Society notes that early bladder cancer typically causes bleeding but little or no pain, which is a large part of why the sign gets brushed off.
The trickier feature is that the bleeding is often intermittent. Blood might not be visible in the urine every day if a person has bladder cancer, according to the American Cancer Society, so a single episode that clears up on its own is not reassurance that nothing is wrong.
Why the earliest sign gets missed
Bladder cancer is one of the ten most common cancers in the United States, and the American Cancer Society projects about 84,530 new cases and 17,870 deaths in 2026. Yet the signature symptom looks a lot like a urinary tract infection, a kidney stone, or the aftermath of hard exercise.
Fred Hutchinson Cancer Center points out that these signs are usually caused by other conditions, such as infections, a stone in the kidney or bladder, a noncancerous tumor or another benign kidney disease, not cancer, which is exactly why people wait.
Also read: 8 warning signs you may have sleep apnea, and why it matters beyond loud snoring
Waiting matters because stage does. American Cancer Society survival data for 2015-2021 put the five-year relative survival at 73% for invasive cancer still contained within the bladder wall, dropping to 41% once it has spread to nearby structures and 9% once it has reached distant organs. Catching it while it is still localized is what makes the difference.
7 early warning signs worth a doctor's visit
Blood in the urine. Pink, orange, rusty red or dark red. It may be visible only sometimes, or found only on a lab test.
Going more often than usual. A shift in your baseline frequency, not a one-day event.
Sudden urgency. Feeling as if you need to go right away, even when your bladder is not full, is a symptom the American Cancer Society lists explicitly.
Also read: What your waist size can reveal about your heart, diabetes and longevity
Pain or burning during urination. Common with a UTI, but persistent burning without an infection deserves a workup.
Trouble urinating or a weak stream. Difficulty starting or a noticeably weaker flow.
Lower back pain on one side. The American Cancer Society lists one-sided lower back pain among symptoms of more advanced disease.
Unexplained fatigue, appetite loss or weight loss. Also flagged by the American Cancer Society as later-stage signals that should not be attributed to age or stress by default.
Also read: How eating blueberries every day can affect your heart, brain and blood sugar
For a broader picture of what to watch for, see the early cancer symptoms doctors want you to take seriously. None of these bladder signs individually proves cancer. What they mean is that the cause needs to be identified rather than assumed.
The message from specialists
Urologists tend to be blunt about the intermittent bleeding pattern because it lulls people into a false sense of security. A University of Florida Health explainer featuring urologist Dr. Paul Crispen notes that blood in the urine is typically one of the first bladder cancer signs, and that it may be present on a regular basis or disappear and reappear over days or weeks.
The practical takeaway from the authorities is simple. A single episode of visible blood in your urine, even one that goes away on its own, is enough reason to call your doctor the same day. Most of the time it will turn out to be something benign. When it is not, an early appointment is what protects the odds.
Also read: The truth about eating eggs after 60, according to experts
Also read: Finnish researchers found the key ingredient that makes their sauna so healthy
This article is made and published by Jesper Bengtson, who may have used AI in the preparation.