Stool test occult blood is positive may be a false positive factor, or it may be caused by gastrointestinal diseases, liver and gallbladder diseases, systemic diseases and other causes of gastrointestinal bleeding. 1. False-positive factors: Eating pig liver, animal blood, intake of food containing high iron ions, medications, etc. can lead to a positive fecal occult blood test. 2. Gastrointestinal diseases: Gastric ulcer, erosive gastrointestinal sinusitis, infectious enteritis and other intestinal diseases may lead to the emergence of a positive fecal occult blood test. 3. Hepatobiliary diseases: Hepatobiliary diseases such as cirrhosis can lead to rupture and bleeding of esophagogastric fundal varices, resulting in positive fecal occult blood. 4. Systemic diseases: cardiovascular and cerebrovascular diseases, blood system diseases, taking drugs (such as non-steroidal anti-inflammatory drugs) can cause gastrointestinal bleeding. Hemorrhoids, anal fissure and other anorectal diseases can also lead to a positive fecal occult blood test, it is recommended that patients follow the doctor’s instructions in time for further examination, to clarify the cause of the disease to take the correct treatment, so as to avoid delaying the condition.