For general gastritis such as acute gastritis or chronic gastritis, there is basically no change in the stool, which means it does not cause positive fecal occult blood. Most clinical manifestations of gastritis are epigastric pain, epigastric distention, nausea, vomiting, acid reflux, belching, early satiety, indigestion, etc. When patients have positive occult blood in the stool, they need to be alert to the possibility of gastrointestinal bleeding, which is more common in the upper gastrointestinal tract, such as bleeding caused by peptic ulcers. There is also the possibility of acute erosive hemorrhagic gastritis, which may also cause positive occult blood in the stool, so care needs to be taken to rule it out, and electronic gastroscopy can usually be improved to assist in a clear diagnosis. Under the microscope, the gastric mucosal lesions can be visualized, and if necessary, biopsy or microscopic hemostasis can be performed. A positive fecal occult blood may also be a false positive, so attention should be paid to differentiation.