Some injuries can bruise your kidney. This may cause blood to appear in your urine. The blood may be in small amounts that you can't see; or, it might color your urine pink or light red. Any blood usually clears in 1 to 2 days and the kidney function returns to normal. If the blood does not clear from your urine after 2 days, call your doctor.
The following are signs and symptoms of renal contusion:
Blood in the urine
Flank pain (the area between your hip and ribs)
Bruising, swelling, or seatbelt marks in the area of your kidney
If you've had a bruise to your kidney, follow these tips:
Drink lots of fluid (at least 8 to 10 glasses of water a day).
Rest and avoid heavy lifting and strenuous activity for the next few days.
You may use acetaminophen or ibuprofen to control pain, unless another medicine was prescribed. [NOTE: If you have chronic liver or kidney disease or ever had a stomach ulcer or gastrointestinal bleeding, talk with your doctor before using these medicines.] Aspirin should never be used in anyone under 18 years of age who is ill with a fever. This may cause Reye Syndrome which can lead to severe liver damage.
Follow up with your health care provider or return to this facility if you are still having blood-tinged urine after 48 hours.
Call 911 if any of the following occur:
Fainting or loss of consciousness
Rapid heart rate
Severe abdominal pain or swelling
Loss of feeling or weakness in your legs
Incontinence (inability to hold your urine)
Get prompt medical attention if any of the following occur:
Back or abdominal pain that gets worse
Weakness or dizziness
Increasing amount of blood color in the urine
Passage of blood clots in the urine
Unable to pass urine
Fever of 100.4°F (38ºC) or higher, or as directed by your health care provider