Red or pink urine has several possible explanations, ranging from something you ate to a condition that needs medical attention. In many cases, the cause is harmless, but visible blood in urine (called gross hematuria) always warrants investigation. The key first step is figuring out whether your urine is actually bloody or simply discolored by food, drink, or medication.
Foods That Turn Urine Red
Beets are the most common dietary culprit. The pigments responsible, called betacyanins, pass through some people’s digestive systems without being fully broken down, tinting urine pink or red. This happens in roughly 10% to 14% of the general population after eating enough beets or beetroot. If you’re low on iron or have a condition that affects nutrient absorption, the rate jumps significantly, reaching about 45% in people with certain types of anemia.
Rhubarb, blackberries, and other deeply pigmented foods can produce a similar effect. The discoloration is completely harmless and typically clears within a day or two after you stop eating the food. If you recently had a beet salad or a smoothie with dark berries, that’s likely your answer.
Medications That Change Urine Color
Several common medications can turn urine red, orange, or reddish-brown without any blood being present. Phenazopyridine, a widely used over-the-counter bladder pain reliever, produces a vivid reddish-orange color that can be alarming if you’re not expecting it. Rifampin, a tuberculosis antibiotic, does the same. Laxatives containing senna can also shift urine toward red or orange. If you started a new medication recently and noticed the color change shortly after, check the drug’s side effects before worrying.
Urinary Tract Infections
Infections in the bladder, kidneys, or urethra are one of the most common medical causes of red or pink urine. Bacteria irritate and inflame the lining of the urinary tract, which can cause small amounts of bleeding. You’ll usually have other symptoms alongside the color change: a burning sensation when you urinate, a frequent or urgent need to go, cloudy or strong-smelling urine, or pelvic pressure. Kidney infections may add flank pain, fever, or nausea to the picture.
Kidney and Bladder Stones
Minerals in your urine can crystallize into stones that scrape the lining of the urinary tract as they move, producing visible blood. The hallmark symptom is intense, wave-like pain in your side or lower back that can radiate toward your groin. Some stones pass on their own, but larger ones may need medical intervention. A stone that blocks urine flow, especially when signs of infection are also present, requires urgent evaluation because the combination can quickly become dangerous.
Intense Exercise
Runners, in particular, sometimes notice red or pink urine after long or intense workouts. Research using cystoscopy (a camera inside the bladder) has shown that running on an empty bladder allows the bladder walls to slap against each other with each stride, creating small bruises on the inner lining. These contusions bleed enough to visibly discolor urine. The good news: this type of hematuria resolves within a few days after stopping the activity, and the bladder bruises themselves heal within a few months. Running with some fluid in your bladder, by drinking water beforehand, can reduce the risk.
Muscle Breakdown
Severe muscle injury, whether from an extreme workout, a crush injury, or certain medications, can release a protein called myoglobin into your bloodstream. Your kidneys filter it out, and in high enough concentrations it turns urine a dark tea or cola color that can look reddish-brown. This condition, called rhabdomyolysis, is a medical emergency because the excess myoglobin can damage the kidneys. If your urine is dark brownish-red after intense physical exertion and your muscles feel unusually sore or weak, get evaluated promptly.
Enlarged Prostate
In men, an enlarged prostate (benign prostatic hyperplasia) is a common cause of blood in urine, especially after age 50. The swollen prostate tissue develops fragile blood vessels on its surface that can rupture and bleed into the urinary tract. This is separate from prostate cancer, though both conditions can produce hematuria, which is one reason persistent or recurring blood in urine should be checked.
More Serious Causes
Bladder, kidney, and prostate cancers can all cause blood in urine. These cancers often produce painless hematuria, meaning the red urine may be your only early symptom. Blood-clotting disorders like hemophilia, sickle cell disease, and kidney diseases that damage the filtering units (glomeruli) are additional possibilities. None of these are common compared to infections or dietary causes, but they’re the reason doctors take blood in urine seriously even when you feel fine otherwise.
How Doctors Figure Out the Cause
The first step is a urinalysis, where a urine sample is examined under a microscope. Doctors look for red blood cells, and finding 3 or more per high-power field confirms hematuria even if the urine looks normal to the naked eye. This distinction matters because microscopic hematuria, invisible to you, can be just as clinically significant as the visible kind.
If blood is confirmed, the workup typically involves imaging of the upper urinary tract, usually an ultrasound or CT scan, to check the kidneys and ureters for stones, masses, or structural problems. A cystoscopy, where a thin camera is passed through the urethra into the bladder, is used to examine the bladder lining directly. No imaging technology is sensitive enough on its own to reliably detect bladder tumors, so cystoscopy remains a standard part of a thorough evaluation. Your doctor will also take a full history, including medications, recent exercise, diet, and family history of kidney disease or cancer, to guide which tests are needed.
Signs That Need Urgent Attention
Most causes of red urine aren’t emergencies, but certain combinations of symptoms are. Blood clots in your urine can accumulate in the bladder and block urine flow entirely, causing acute retention, a painful and urgent situation. Flank pain with fever and blood in urine suggests a possible infected kidney stone, which can progress to sepsis. Persistent blood in urine with unexplained weight loss, especially in someone over 40 with a smoking history, raises concern for urinary tract cancer. And if you notice a significant drop in how much you’re urinating alongside dark or bloody urine, your kidneys may be struggling and need immediate evaluation.
If your urine turned red once after eating beets and you feel completely fine, you can reasonably wait and see if it clears. If the color persists, comes with pain or other symptoms, or you can’t trace it to food or medication, getting a urine test is the logical next step.