Hematuria (1+) often suggests the possibility of bleeding in the urinary system. Generally speaking, red blood cells in urine belong to (-), and when the red blood cells in urine are (1+) in routine urine examination it means that there is an abnormal increase in red blood cells in urine. Many diseases of the urinary system can cause urinary occult blood (+), the main common diseases such as infections of the urinary system, infections that cause inflammatory bleeding can cause an abnormal increase in red blood cells, appearing as urine red blood cells (1+). It can also be seen in urinary stones, which can also cause bleeding in the urinary tract. Other causes, such as tumors of the urinary system, where the bleeding is not serious in the early stages, can also cause the occurrence of urinary occult blood (+). The presence of urinary occult blood (+) needs to be combined with the patient’s other accompanying symptoms and methods of ancillary testing to help clarify the specific cause, and then choose a reasonable treatment method for treatment.