Why is urine black?

The urine is black, indicating that it is old bleeding, not fresh bleeding. In this case, it is also hematuria. The greatest possibility is that hematuria comes from the kidneys, ureters, or blood clots in the bladder, which will show black urine after slow organization. In this case, it is recommended to drink more water and expel the old bleeding from the body. It is recommended to further do urine exfoliation cell examination to find out if there are tumor cells. To do kidney, ureter, bladder color ultrasound examination, assess whether there are tumor changes in the urinary system. If B ultrasound examination is not clear, CT should be further examined. Show black urine, it must not be normal, must check clearly.