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    Urine - abnormal color

    Discoloration of urine

    The usual color of urine is straw-yellow. Abnormally colored urine may be cloudy, dark, or blood-colored.

    Causes

    Abnormal urine color may be caused by infection, disease, medicines, or food you eat.

    Cloudy or milky urine is a sign of a urinary tract infection, which may also cause a bad smell. Milky urine may also be caused by bacteria, crystals, fat, white or red blood cells, or mucus in the urine.

    Dark brown but clear urine is a sign of a liver disorder such as acute viral hepatitis or cirrhosis, which causes excess bilirubin in the urine.

    Pink, red, or lighter brown urine can be caused by:

    • Beets, blackberries, or certain food colorings
    • Hemolytic anemia
    • Injury to the kidneys or urinary tract
    • Medication
    • Porphyria
    • Urinary tract disorders that cause bleeding

    Dark yellow or orange urine can be caused by:

    • B complex vitamins or carotene
    • Medications such as phenazopyridine (used to treat urinary tract infections), rifampin, and warfarin
    • Recent laxative use

    Green or blue urine is due to:

    • Artificial colors in foods or drugs
    • Bilirubin
    • Medications, including methylene blue
    • Urinary tract infections

    When to Contact a Medical Professional

    See your health care provider if you have:

    • Abnormal urine color that cannot be explained and does not go away
    • Blood in your urine, even once
    • Clear, dark-brown urine
    • Pink, red, or smoky-brown urine that is not due to a food or drug

    What to Expect at Your Office Visit

    The health care provider will perform a physical exam. This may include a rectal or pelvic exam. The doctor will ask you questions about your symptoms such as:

    • When did you first notice a change in urine color and how long have you had the problem?
    • What color is your urine and does the color change during the day? Do you see blood in the urine?
    • Are there things that make the problem worse?
    • What types of foods have you been eating and what medicines do you take?
    • Have you had urinary or kidney problems in the past?
    • Are you having any other symptoms (such as increase such as pain, fever, or increase in thirst)?

    Tests that may be done include:

    • Blood tests, including liver function tests
    • Ultrasound of kidneys and bladder
    • Urinalysis
    • Urine culture for infection

    References

    Gerber GS, Brendler CB. Evaluation of the urologic patient: History, physical examination, and the urinalysis In: Wein AJ, ed. Campbell-Walsh Urology. 10th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 3.

    Landry DW, Bazari H. Approach to the patient with renal disease. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 116.

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    • Female urinary tract

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    • Male urinary tract

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      • Female urinary tract

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      • Male urinary tract

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      Tests for Urine - abnormal color

      Review Date: 12/27/2013

      Reviewed By: Louis S. Liou, MD, PhD, Chief of Urology, Cambridge Health Alliance, Visiting Assistant Professor of Surgery, Harvard Medical School. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.

      The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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