The kidneys are located behind the abdomen and are present in both flanks. Because the kidneys are vital for life, they are well protected. However, in rare cases, they can become injured, resulting in a kidney bruise.
Causes
Bruises of the kidney are usually due to trauma, the Merck Manual explains. In general, a bruised kidney is caused by blunt force trauma, which can occur during a fall, a car accident, or as part of a sports injury. The kidneys can also become bruised due to some medical procedures, such as the removal of a kidney stone.
Symptoms
The bruising of a kidney can result in abdominal bruising and pain, Medline Plus explains. Patients can also develop blood in the urine, which may be visible or, in the case of more minor kidney injuries, may only be seen when the urine is examined using a microscope.
Treatment
Kidney bruising is typically treated using rest and control of fluid intake, the Merck Manual explains. This is because the kidneys are able to heal on their own, provided that they are given time and support to prevent further injury. Surgery is usually only needed for more severe injuries, which result in the detachment of the kidneys from their blood supply.
