Positive urine occult blood indicates the presence of hemoglobin and myoglobin in the tested urine, which is clinically considered to be due to intravascular hemolysis, hemolysis in the urinary tract, or destruction of muscle tissue due to inflammatory stimulation, trauma, metabolic disorders, etc. thus causing hemoglobin or myoglobin to be excreted from the urine. There are many clinical conditions that can suggest positive urine occult blood, but a single positive occult blood cannot help diagnose the disease and it is recommended that it can be combined with other test results to help clarify the diagnosis. It is important to note that if a woman is having a urine occult blood test, she needs to avoid her menstrual period, as it may affect the test results before or before her menstrual flow. In addition, taking large amounts of vitamin C, anticoagulant medication, or sudden strenuous exercise may also affect the test results. If the test result is accurate, generally consider that it may be caused by urinary system diseases and adjacent organ lesions, or systemic diseases: 1. Urinary system diseases: for the most common cases, urinary tract infection, pyelonephritis, urinary stones, kidney stones, glomerulonephritis, renal tuberculosis, kidney cancer, bladder cancer, polycystic kidney, etc. Most of these diseases are accompanied by symptoms of abnormal urination, such as frequent urination, urgent urination, painful urination, difficult urination, Most of these diseases are accompanied by symptoms of abnormal urination, such as frequent urination, urgent urination, painful urination, difficulty in urination, flesh-eye hematuria, lumbar pain, etc., which can be initially identified; 2. Proximity organ lesions: for example, men with prostatitis, seminal vesiculitis, women with pelvic inflammatory disease, tubitis, vaginitis, cervical cancer, etc., and other lesions, including acute appendicitis, rectal cancer, colon cancer, etc., may be examined for positive urine occult blood; 3. Systemic diseases: filariasis, scarlet fever, sepsis, leukemia, aplastic impaired anemia, allergic purpura, rheumatoid arthritis, systemic lupus erythematosus, subacute infectious endocarditis, chronic heart failure, etc. Because many clinical conditions can appear positive urine occult blood, generally need to clarify the presence of carnal hematuria, and combined with other symptoms, signs and other tests, such as urine red blood cell microscopy, urine culture, urinary system ultrasound or CT imaging, laboratory tests, etc. to clarify the diagnosis, so as to give targeted treatment.