Because blood in urine can be a sign of a serious medical condition, however, it shouldn't be ignored. All cases of hematuria should be evaluated by a doctor who can order tests to confirm or rule out an underlying cause.
Hematuria is the presence of red blood cells in the urine. If there are enough red cells, the urine can become bright red, pink or cola colored. Often, however, the urine appears completely normal because there is not enough blood to cause a color change. In this case, the condition is called "microscopic" hematuria.