If the urine microscopy is high in red blood cells, then the presence of bleeding disorders is considered and further examination is needed to clarify the cause of bleeding. First, if the patient has abnormal coagulation function, such as prolonged clotting time or reduced platelets, it may cause an increase in urine erythrocytes, and may also be accompanied by meatus hematuria, which requires relevant coagulation function tests, while the patient may be accompanied by easy bleeding of skin mucosa, or bleeding gums when brushing teeth. Secondly, when there are stones, tumors, polyps and other changes in the urinary tract, they can lead to local mucosal rupture and bleeding, which can be checked by urinalysis to detect a high number of red blood cells in the urine, and it is necessary to conduct ultrasound examination of the urinary system to exclude any of the above factors. Third, when an acute infection of the urinary tract occurs, high red blood cells can also occur, and high white blood cells and bacteria can be found in the urinalysis, and the patient mostly has symptoms of frequent urination, urinary urgency, and painful urination, and requires urine culture examination to confirm the diagnosis.