Blood in Urine
Blood in the urine is also called hematuria. Normally, urine does not contain blood.
There are two kinds of hematuria:
- Microscopic hematuria—Urine contains a very small amount of blood, which is not visible to the naked eye.
- Gross hematuria—Urine is visibly discolored by blood, appearing red or tea-colored.
In some cases, the cause of hematuria is never found. The list of known causes is lengthy. Some more common causes include:
- Injury to the abdomen, pelvis, or internal organs of the urinary tract
- Vigorous exercise (resolves with rest)
- Urinary tract infection or kidney infections
- Cancer of the prostate, kidney, or bladder
- Kidney disease
- Kidney stones
- Bleeding disorders (eg, hemophilia)
- Certain congenital diseases (eg, polycystic kidneys)
- Radiation of the pelvis (for cancer treatment)
- Certain medications
Last reviewedJanuary 2013by Adrienne Carmack, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.