If a patient goes to the hospital for a urine test, an increase in red blood cells in the urine indicates the presence of a disease in the urinary tract. Under normal circumstances, urine does not contain red blood cells or contains very few red blood cells. When urinalysis tests show an increase in red blood cells, the main reason is due to a disease of the urinary tract. Most of the urinary system diseases may lead to an increase in red blood cells in urine, and the more common reasons are due to urinary system inflammation, stones, tumors and other diseases that lead to an increase in red blood cells in urine. In addition, physiological reasons such as after strenuous exercise and lumbar massage may also lead to increased red blood cells in urine. It is recommended to go to the urology department of the hospital for relevant examinations to clarify the diagnosis and to treat under the guidance of the doctor.