Occult blood in the stool indicates that there is bleeding in the digestive tract, but not much bleeding, which can only be detected by laboratory tests. It may also be caused by the consumption of animal blood or meat and there is occult blood in the stool. 1, the first stool occult blood positive and accompanied by abdominal pain, stool is not formed, the number of stools than the original increase, consider the intestinal mucosa damage, if the stool routine shows more than 15 to 20 red / white cells, consider the bacterial infection, also known as bacterial dysentery, should consider doing stool culture, and do drug sensitivity test, select the appropriate antibacterial drugs for treatment. And if it is chronic, often unformed stools, abdominal pain worsens after eating some cold, hot, irritating food, consider the possibility of colitis, the need for colonoscopy. 2, fecal occult blood positive, if the last three days to consume animal blood or meat, you can consider fasting green vegetables, meat food after three days to re-test a stool routine. If there is a lot of occult blood, black or tarry stools, fasting, and gastroscopy, consider the possibility of upper gastrointestinal bleeding. If the stool test is found to be positive for occult blood, further tests should be done to clarify and then promptly target treatment.