The next step is to improve the renal function, urinary protein, urological ultrasound, CT and other imaging tests, as well as urine erythrocyte phase difference morphology examination. Many diseases can cause urinary occult blood 3 +, the more common are various acute and chronic nephritis, as well as urinary tract tumors, stones, urinary tract infections and so on. Renal function and urine protein examination can be carried out to clarify whether renal function injury occurs. In order to identify the cause of the disease, the ultrasound of the urinary system can be improved to exclude urinary stones and tumors. Secondly, urine erythrocyte morphology examination is needed, which can initially determine whether the red blood cells in the urine are due to various kidney diseases or due to other diseases. If the rate of red blood cell abnormality in urine is greater than 80%, or the presence of spiny red blood cells, it is considered to be due to nephritis and other diseases. If the normal red blood cells are greater than 80%, it is considered to be caused by urinary stones, tumors or urinary bleeding, and then we should further improve the urinary CT and other imaging examinations, and perform cystoscopy if necessary. If the urine occult blood is found to be abnormal, it is recommended to go to the hospital in a timely manner, complete the relevant examinations under the guidance of the doctor, to clarify the cause, and actively treat.