bld urinary occult blood refers to the number of red blood cells in the urine exceeds the normal range when the patient is doing routine urinalysis, and this situation belongs to the positive urinary occult blood. Normal people’s urine in the use of slide method detection, each high power vision of the normal value of 0 ~ 3, generally in more than 3, patients in the urine routine examination will appear urine occult blood positive; appear such examination results can be due to physiological reasons and pathological reasons. 1. Physiological reasons: ordinary people may have positive occult blood in urine after excessive fatigue, which is mostly transient and can be relieved after proper rest; secondly, hematuria may also occur after taking certain medicines (e.g. rifampicin), and the symptoms will disappear after stopping the medicine. 2. Pathological reasons: in the disease, such as cystitis, nephritis, ureteral stones and so on will appear in the urine occult blood test positive, the patient needs to accept the regular treatment in time. If the urine occult blood test result is abnormal, it is recommended to consult a doctor in time, with the help of the doctor to clarify the cause of the disease, and targeted treatment or treatment.