Positive fecal occult blood test usually means the following possibilities: 1, pay attention to dietary factors, if you eat pig’s blood or pig’s liver and so on will appear positive occult blood. 2, pay attention to the influence of medication factors, if you take iron treatment will also appear positive occult blood. 3, the most common is to consider the gastrointestinal tract has a small amount of more than 5mL of bleeding, pay attention to the search for the cause of the disease, usually should be to see a pediatric gastroenterology specialist outpatient clinic. Pediatric gastroenterology clinic, the possible causes are intestinal viruses, bacterial infections caused by intestinal mucosal damage, bleeding, food allergies caused by gastrointestinal mucosal damage, bleeding, but also pay attention to intestinal polyps, intussusception or other surgical conditions caused by the possibility of bleeding.