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What causes a trace amount of blood in the urine?

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Quick Answer

Blood in urine can be caused by a number of conditions including bladder or kidney infection, kidney stones, enlarged prostate, bladder tumors and certain medications. All cases of blood in urine should be evaluated by a doctor to confirm the underlying cause, explains WebMD.

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Full Answer

Medically known as hematuria, blood in urine can come from the kidneys, where urine is made, according to WebMD. It can also come from other locations in the urinary tract such as the uterus, bladder and urethra. Instead of the typical pale yellow color, a patient's urine may be pink, red, brownish-red or tea-colored. Blood in urine is not always visible to the naked eye and sometimes can only be detected by a lab test. This is known as microscopic hematuria.

Hematuria can occur without symptoms. The underlying causes associated with hematuria range from moderate to severe, reports WebMD. Bladder infections usually cause burning or pain with urination along with blood. Severe pain in the abdominal or pelvic area, fevers, chills and flank pain may be caused by kidney infections or kidney stones.

Typically, no treatment is required for hematuria unless the underlying the condition is severe. If an underlying cause is not found during an evaluation, a patient is usually advised to have regular testing and blood pressure monitoring every three to six months, says WebMD. Urine tests may include urine cytology and blood tests. Additional imaging tests such as computed tomography, kidney ultrasound, intravenous pyelogram, cystoscopy and kidney biopsy may also be needed.

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