Urine occult blood +- represents a small number of red blood cells in the urine, the emergence of urine occult blood has physiological and pathological reasons. 1. physiological factors: urine concentration can make the normal urine in the material is also concentrated, thus the phenomenon of urine occult blood +-, when the urine back to normal concentration, this situation will become negative. In addition, women’s menstrual period, or strenuous activities, overworked blood in the urine occult blood increase, through a special period, urine occult blood will gradually return to normal. 2. Pathological factors: can be seen in urinary tract infection, urinary stones, glomerulonephritis, urinary tract tumors, etc., in addition to the systemic coagulation dysfunction can also lead to the emergence of occult blood in the urine, need to be under the guidance of the doctor according to the cause of targeted treatment, such as the application of antibiotics (levofloxacin, etc.) and so on. In daily life, we should pay attention to local hygiene, change underwear, drink more water, try not to eat spicy and stimulating food. It is recommended that patients with urinary occult blood +- go to the hospital in a timely manner, complete the relevant examinations, clarify the cause of the disease under the guidance of the doctor for symptomatic treatment, to avoid delays in the condition.