Fecal occult blood positive need to be repeated several times to review, if repeated several times positive to the hospital, further gastroscopy, enteroscopy, to clarify the cause of fecal occult blood. Treatment is mainly to clarify the cause of fecal occult blood, if it is gastritis, peptic ulcer, you can use omeprazole, pantoprazole and other acid suppression agents, or the use of gastric mucosal protective agents. If it is polyps can be removed by gastroscopy and enteroscopy, and tumors usually need to be treated by surgery. Positive fecal occult blood refers to the blood or red blood cells in the stool that cannot be observed through the naked eye or microscope, but the ferrous hemoglobin released after the destruction of red blood cells can be detected through the occult blood test. Positive occult blood test can be seen from the mouth, nose, esophagus, stomach, intestines, up to the anus of any part of the bleeding, as long as the bleeding is greater than 5 ml that can be manifested in the fecal occult blood positive, which is the most important cause of gastrointestinal bleeding, including peptic ulcer, gastric mucosal injury, gastrointestinal tumors, colitis, Crohn’s disease, can be caused by positive occult blood in the stool. Meanwhile, positive fecal occult blood can also be affected by diet and medication, such as eating animal offal, pig’s blood, duck’s blood, and eating a lot of spinach can cause positive fecal occult blood. In addition, iron and bismuth supplements can also cause positive fecal occult blood. Therefore, 3 days before the test, it is recommended to abstain from eating animal blood and liver, as well as iron supplements and other interfering foods and medications.