Whether urine occult blood (+) is serious depends on the cause of the cause of urine occult blood: 1. If the specimen is contaminated, such as women’s menstrual period mixed with the urinary occult blood generated by menstruation, the urinary occult blood is a false positive, it is recommended to review regularly and is not serious; 2. If the cause of urinary occult blood is due to urinary tract infection or urinary tract stones, it can be completely improved by treatment, so it is not also not particularly serious; 3, If the urinary tumor is caused by urinary tract tumor, the urinary occult blood is relatively serious, because if the tumor is malignant, metastasis may occur, and even affect the patient’s life; 4, if the urinary occult blood is caused by glomerulonephritis, if there is no combination of renal insufficiency or no combination of proteinuria, the condition is relatively mild, if the urinary occult blood is caused by kidney disease, combined with a large amount of If the kidney disease causes urinary occult blood, combined with a large amount of proteinuria or renal insufficiency is relatively serious; 5, if the systemic systemic diseases, such as thrombocytopenic purpura caused by urinary occult blood is relatively serious, because thrombocytopenic purpura may lead to gastrointestinal bleeding or even cerebral hemorrhage leading to life-threatening.