What's wrong with brown urine?

Urine brown may be the following conditions: First, the urinary system old bleeding, more common in bladder, renal pelvis and other parts of the old bleeding, normal urine will be caused to show brown; Second, hemolytic diseases, immune hemolysis and transfusion hemolysis and other diseases, more likely to lead to red blood cells are destroyed and release red blood protein, often through kidney metabolism into urine, resulting in urine showing brown; Third, black urine aciduria is a genetic disease, mainly due to the lack of black urine acid oxidase in the human body, resulting in the presence of black urine acid in the urine, and caused the urine to be brown.