Read below about bright red (bloody) urine, including causes and common questions. Or get a personalized analysis of your bright red (bloody) urine from our A.I. health assistant. At Buoy, we build tools that help you know what’s wrong right now and how to get the right care.

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7 Potential Bright Red (Bloody) Urine Causes

Disclaimer: The article does not replace an evaluation by a physician. Information on this page is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purposes.

  1. 1.Acute Postinfectious Glomerulonephritis

    The kidneys are a pair of important organs that lie near the spine whose function is to filter blood. There are about 1 million glomeruli in each kidney, which are tiny balls of thin blood vessels where there filtration takes place. After an infection anywhere in the body, especially a streptococcal infection (strep throat), these glomeruli may become inflamed.

    Symptoms last 2 weeks or less.

    Rarity:
    Rare
    Top Symptoms:
    headache, nausea, loss of appetite, vomiting, fatigue
    Urgency:
    Primary care doctor
  2. 2.Bladder Cancer

    The bladder is a hollow organ in your lower abdomen that stores urine. Bladder cancer, which occurs in the lining of the bladder, is the sixth most common type of cancer in the United States.

    Your outcome is dependent on the extent of the disease.

    Rarity:
    Rare
    Top Symptoms:
    abdominal pain (stomach ache), constipation, pelvis pain, side pain, frequent urination
    Urgency:
    Primary care doctor
  3. 3.Painful Bladder Syndrome (Interstitial Cystitis)

    Painful bladder syndrome, also known as interstitial cystitis (IC), is a chronic condition that causes discomfort or pain in the bladder and a need to urinate frequently and urgently. The cause of this condition is not very clear and it is usually diagnosed when other causes like urinary tract infections are excluded.

    Chronic disease whose progression varies highly from person to person. Symptoms may persist for years.

    Rarity:
    Rare
    Top Symptoms:
    fatigue, abdominal cramps (stomach cramps), depressed mood, pelvis pain, arthralgias or myalgias
    Urgency:
    Primary care doctor

    Bright Red (Bloody) Urine Checker

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  4. 4.Interstitial Nephritis

    The tissue of the kidneys can become inflamed for many different reasons, ranging from medications to infection to our own immune system

    2 weeks if recognized

    Rarity:
    Rare
    Top Symptoms:
    fatigue, loss of appetite, joint pain, side pain, fever
    Urgency:
    Primary care doctor
  5. 5.Alport Syndrome

    Alport syndrome is an inherited disorder that damages the blood vessels in the kidneys.

    Life long

    Rarity:
    Rare
    Top Symptoms:
    side pain, swollen foot, swollen ankle, bright red (bloody) urine, pink/blood-tinged urine
    Symptoms that never occur with alport syndrome:
    severe fever
    Urgency:
    Primary care doctor
  6. 6.Glanzmann Thrombasthenia

    Platelets are cells in the blood that are needed to form blood clots and prevent uncontrollable bleeding. Glanzmann thrombasthenia (GT) is a rare inherited (genetic) disorder in which platelets do not function normally. The symptoms of this disease are bleeding from the gums, in the digestive tract, as well as purple-red spots on the skin called petechiae.

    Chronic condition requiring lifelong management. Prognosis is good with platelet transfusions for bleeding complications.

    Rarity:
    Rare
    Top Symptoms:
    unexplained bruising, heavy menstrual flow, bright red (bloody) urine, pink/blood-tinged urine, nose bleed that started spontaneously
    Urgency:
    Primary care doctor
  7. 7.Goodpasture Syndrome

    Goodpasture syndrome is an autoimmune disorder, which means immune system mistakenly attacks and destroys healthy body tissue. Persons with this syndrome develop substances that attack a protein called collagen in the tiny air sacs in the lungs and the filtering units (glomeruli) of the kidneys.

    Autoimmune disorders of this type are considered irreversible, but symptoms can be effectively managed with treatment.

    Rarity:
    Rare
    Top Symptoms:
    fatigue, nausea, shortness of breath, muscle aches, fever
    Urgency:
    Primary care doctor

Questions Your Doctor May Ask About Bright Red (Bloody) Urine

  • Q.Any fever today or during the last week?
  • Q.Are you sexually active?
  • Q.Do you feel pain when you urinate?
  • Q.Have you experienced any nausea?

If you've answered yes to one or more of these questions, try our bright red (bloody) urine symptom checker to find out more.

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Bright Red (Bloody) Urine Symptom Checker Statistics

  • People who have experienced bright red (bloody) urine have also experienced:

    • 12% Painful Urination
    • 6% Abdominal Pain (Stomach Ache)
    • 5% Pink / Blood - Tinged Urine
  • People who have experienced bright red (bloody) urine were most often matched with:

    • 8% Bladder Cancer
    • 2% Painful Bladder Syndrome (Interstitial Cystitis)
    • 1% Acute Postinfectious Glomerulonephritis
  • Source: Aggregated and anonymized results from visits to the Buoy AI health assistant (check it out by clicking on “Take Quiz”).

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