Elevated red blood cells in urine is an abnormal phenomenon, which occurs mainly due to the following reasons, such as urinary tract stones, urinary tract infections, urinary tract tumors, or external injuries, etc., so it is necessary to carry out the relevant differential diagnosis of the above diseases. If the patient has no history of trauma, the possibility of external injury can be excluded. If there are also elevated white blood cells in the urine in addition to elevated red blood cells, a diagnosis of urinary tract infection can be confirmed. If the red blood cells are simply elevated, it may be due to urinary stones, so it is recommended to do further urinary ultrasound examination.