What are changes in urine?

Normal urine is yellowish in color, ranging from clear to deep amber. The color depends on how diluted it is, meaning how much liquid you consume. All urine has a slight odor that can vary with your diet.

Changes in urine can refer to:

  • Color changes.
  • Changes in odor.
  • Changes in consistency (for example, urine may appear foamy).

Sometimes these changes are temporary and harmless. They may be the result of eating certain foods or vitamins, or taking some medicines. Asparagus or beets can harmlessly change the odor and color of urine, for example.

Other times, changes in urine may be the result of a more serious underlying medical condition.

Who experiences changes in urine?

Anyone can experience changes in urine. It is more frequently seen in adult women, since a change in urine is a common symptom of urinary tract infections. Women more frequently experience these infections. Older adults and adults with a family history of kidney or bladder stones are also more prone to experience changes in urine.

What causes changes in urine?

The most harmless changes in urine color come from things you eat:

  • Foods such as beets, fava beans, blackberries, and rhubarb can turn urine reddish, or sometimes dark brown.
  • Carrots can turn urine light orange. Vitamin C can also turn urine orange.
  • B vitamins can give urine a greenish tinge.
  • Foods that use strong color dyes can also temporarily change urine color.

Certain medications may also change the color of your urine. Check the label or consult your physician to see if this is a possible side effect. For example:

  • Stomach acid reducer Tagamet® can turn urine a blue shade.
  • Some chemotherapy medicines can turn urine orange.
  • Phenazopyridine (Pyridium®), a drug used to treat urinary tract and bladder pain, can also give urine an orange hue.

More seriously, changes in urine color can be symptomatic of an underlying medical condition:

  • Red tinged urine can indicate blood in your urine, which could be caused by a urinary tract infection, kidney stones, or in rare cases, cancer.
  • Reddish urine could also be a sign of lead or mercury poisoning.
  • Dark brown urine could indicate liver failure.
  • Cola- or tea-colored urine could indicate inflammation of the kidneys (glomerulonephritis).
  • Orange hued urine can also indicate a problem with the liver or bile duct.
  • Greenish or cloudy urine may be symptomatic of a urinary tract infection.

Changes in urine odor can also be caused by diet, vitamins or medication. Asparagus is known to give urine more of an ammonia smell. B-6 supplements can also give urine a strong odor. You may also experience changes in urine odor if you are not drinking enough water. Highly concentrated urine can have a strong ammonia smell.

Underlying conditions that change urine odor can be very serious. They include:

  • Diabetes.
  • Bladder infections.
  • Kidney infections.
  • Liver failure.
  • Metabolic disorders.

Infections will commonly have other symptoms besides a strong odor to the urine. These symptoms can include:

  • Urinating very frequently.
  • Having pain with urination.
  • Feeling pain in the middle of your back.

Changes in the consistency of urine may give it the appearance of "foaming." This is usually the harmless result of the speed of urination and can appear after eating certain foods. But if this issue persists—especially if you experience leg swelling—you should talk to your doctor. It could be the result of excess protein in your urine, which could signify kidney disease.

Changes in the color, odor or consistency of urine are usually caused by relatively harmless dietary and medicine changes, especially if they occur without any other symptoms. But they can be caused by much more serious underlying conditions. For this reason, it is important to seek medical attention promptly if you notice any changes lasting for a period of time, or which do not seem tied to your diet. If your urine is red (not associated with menstruation) or black (tea-colored) you should contact your healthcare provider without waiting.

What are the symptoms of changes in urine?

The symptoms of changes in urine are very easy to see or smell. They typically include:

  • Changes in the color of your urine.
  • Foaming of the urine.
  • Strong odor changes.

Last reviewed by a Cleveland Clinic medical professional on 01/06/2020.


  • American Kidney Fund. Blood in urine (hematuria). Accessed 1/8/2020.
  • Ferri FF. Ferri's Differential Diagnosis: A practical guide to the differential diagnosis of symptoms, signs and clinical disorders. 2nd ed. Philadelphia, Pa.: Mosby Elsevier; 2011:82.
  • Foot CL, et al. Uroscopic rainbow: Modern matula medicine. Postgraduate Medical Journal. 2006;82:126.
  • Gerber GS, et al. Evaluation of the urologic patient: History, physical examination, and urinalysis. In: Wein AJ, et al. Campbell-Walsh Urology. 9th ed. Philadelphia, Pa.: Saunders Elsevier; 2007.
  • Israni AK, Kasiske BL. Laboratory assessment of kidney disease: clearance, urinalysis, and kidney biopsy. In: Brenner BM, ed. Brenner and Rector's The Kidney. 8th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 23.
  • Landry DW, Bazari H. Approach to the patient with renal disease. In: Goldman L, Ausiello D, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 116.
  • McPherson RA, et al. Basic examination of urine. In: McPherson RA, et al. Henry's Clinical Diagnosis and Management by Laboratory Methods. 21st ed. Philadelphia, Pa.: Saunders Elsevier; 2007.
  • US Department of Health and Human Services, National Institute of Diabetes and Digestive and Kidney Disease. Albuminuria: Albumin in the Urine. Accessed 1/8/2020.
  • American Kidney Fund. Protein in urine. Accessed 1/8/2020.
  • National Kidney Foundation. What You Should Know About Albuminuria (Proteinuria). Accessed 1/8/2020.

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