Baby fecal occult blood test positive, there are physiological causes and pathological causes, physiological usually not serious, pathological more serious, specific analysis is as follows: 1. Physiological reasons: if the baby ate more iron containing food such as blood products in recent time, false positive occult blood test may occur, or use ferrous sulfate preparation to treat anemia in babies, there may be false positive occult blood test in fecal examination, this is usually not serious, adjusting the diet, and stopping the medication will be relieved. 2. Pathological causes: the more common is the digestive tract bleeding caused by blood in the stool, or thrombocytopenic purpura and other bleeding disorders, may lead to fecal occult blood test positive. This kind of is usually more serious, need to consult a doctor in time, clear the cause of bleeding to give targeted treatment.