Blood in the urine is referred to as "hematuria," a term used in medicine. It can occur for a number of reasons and is classified as either microscopic or extensive hematuria.Hematuria can be brought on by a number of conditions, including kidney illnesses, urinary tract infections, kidney stones, injuries to the urinary tract, obstructions of the urinary tract, and renal diseases. If you have hematuria, it's crucial to talk to a doctor so you can identify the underlying reason and get the right care.