The visible sign of hematuria is pink, red or cola-colored urine — the result of the presence of red blood cells. It takes very little blood to produce red urine, and the bleeding usually isn't painful. If you're also passing blood clots in your urine, that can be painful. A lot of times, though, bloody urine occurs without other signs or symptoms.
In many cases, you can have blood in your urine that's visible only under a microscope (microscopic hematuria).
When to see a doctor
Although many cases of hematuria aren't serious, it's important to see your doctor anytime you notice blood in your urine. Keep in mind that some medications, such as the laxative Ex-lax, and certain foods, including beets, rhubarb and berries, can cause your urine to turn red. A change in urine color caused by drugs, food or exercise usually goes away within a few days. However, you can't automatically attribute red or bloody urine to medications or exercise, so it's best to see your doctor anytime you see blood in your urine.
Sep. 01, 2011
- Gerber GS, et al. Evaluation of the urologic patient: History, physical examination, and urinalysis. Wein AJ, et al. Campbell-Walsh Urology. 9th ed. Philadelphia, Pa.: Saunders Elsevier; 2007. http://www.mdconsult.com/das/book/body/151836479-3/0/1445/6.html?tocnode=54299533&fromURL=6.html#4-u1.0-B978-0-7216-0798-6..50005-4_96. Accessed Aug. 2, 2011.
- Rose BD, et al. Evaluation of hematuria in adults. http://www.uptodate.com/home/index.html. Accessed Aug. 1, 2011.
- Margulis V, et al. Assessment of hematuria. Medical Clinics of North America. 2011;95:153.
- Sandhu KS, et al. Gross and microscopic hematuria: Guidelines for obstetricians and gynecologists. Obstetrical and Gynecological Survey. 2009;64:39.
- Jimbo M. Evaluation and management of hematuria. Primary Care Clinics in Office Practice. 2010;37:461.
- McDonald MM, et al. Assessment of microscopic hematuria in adults. American Family Physician. 2006;73:1748.
- Mercieri A. Exercise-induced hematuria. http://www.uptodate.com/home/index.html. Accessed Aug. 1, 2011.
- Urinary tract infections: What you need to know. National Kidney & Urologic Diseases Information Clearinghouse. http://kidney.niddk.nih.gov/KUDiseases/pubs/uti_ES/index.aspx. Accessed Aug. 2, 2011.
- Hematuria (blood in the urine). National Kidney & Urologic Diseases Information Clearinghouse. http://kidney.niddk.nih.gov/KUDiseases/pubs/hematuria/. Accessed Aug. 2, 2011.