The possible reasons for the significant increase in the number of red blood cells in the urinary tract are as follows: 1. Infection of the urinary system, after infection, the mucosa of the urinary tract becomes edematous, erosion and other changes, which can cause the mucosa to break down and bleed, and the patient can experience an increase in the number of red blood cells in the urine, usually accompanied by symptoms of urinary urgency and pain. 2. Stones in the urinary system, such as kidney stones and ureteral stones, can cause the local mucosa to break down and bleed. 3. The urinary tumors are often seen in elderly patients and can cause bleeding due to the breakdown of the tumor itself or the breakdown of the surrounding mucosa, resulting in an increase in the number of red blood cells in the urine. In the early stage, there is usually no conscious symptom, but in the later stage, the tumor increases in size and may be accompanied by local pain. 4. Coagulation dysfunction, if there is a decrease in platelets or prolonged coagulation time, it can cause an increase in the number of red blood cells in urine, which is often seen in systemic bleeding diseases, such as gum bleeding, skin and mucous membrane bleeding, etc.