Gastritis that leads to bloody stools generally manifests as black stools. Treatment primarily involves dietary adjustments and oral medication. It is suggested that patients consume easy-to-digest, light foods. Medications can include acid-reducing and gastric-protective drugs, as well as hemostatics. The treatment duration is usually four to six weeks. Generally, through dietary modifications and medication, very positive effects can be achieved, so patients need not worry excessively. However, for patients experiencing bloody stools, it is necessary to confirm gastric disorders. Routine examinations should include complete blood count, stool analysis, and especially gastroscopy, which is the most crucial diagnostic tool. This can assess the condition of the gastric mucosa and determine if there are any accompanying inflammations, erosions, tumors, or ulcers. Gastroscopy is widely used in clinical practice and generally has a high safety profile, so patients should not be overly reluctant to undergo it. (Please take any medications under the guidance of a physician.)