Urine occult blood (++) suggests the presence of bleeding in the urinary tract, there may also be systemic coagulation dysfunction, further examination is needed to clarify: 1, urinary stones, stones cause the urinary tract mucosa to break down causing bleeding, blood in the urine, urinary routine can be manifested as occult blood (++), serious patients can be accompanied by carnal blood urine, accompanied by lumbar pain, need to carry out ultrasound examination of the urinary system. 2, urinary tract infections, such as pyelonephritis, acute cystitis, urethritis, etc., can cause congestion and edema of the urinary tract mucosa, accompanied by changes in the erosion, the number of red blood cells in the urine will rise, there will be routine urinary occult blood (++), accompanied by frequent urination, urinary urgency, painful urination or with lumbago, fever and other infectious symptoms, need to further urine culture examination to confirm the diagnosis. 3. Tumors of the urinary tract can also cause urine occult blood (++), the tumor itself breaks down, bleeds or causes bleeding of the surrounding mucous membrane damage, can cause the number of red blood cells in the urine to rise, need further examination of the urinary system B ultrasound, CT, etc. to exclude.