To determine whether you have gastritis or gastric ulcer, you need to differentiate according to clinical manifestations and gastroscopy and imaging. 1. Clinical manifestations: gastritis can be manifested as gastric mucous membrane damage caused by severe trauma, mental stress, taking aspirin, etc., manifested as discomfort and vague pain in the middle and upper abdomen, usually irregular. Gastric ulcer has rhythmic epigastric pain associated with meals, mostly manifested as pain 1-2 hours after meals, abdominal pain is more obvious and intense. 2. Gastroscopy: Gastroscopy is the gold standard for identifying gastritis and gastric ulcer. Gastritis is characterized by congestion and edema of the mucosa; gastric ulcer means that the gastric mucosa of the patient is defective and the defect exceeds the muscular layer of the mucosa, and necrotic yellowish-white moss is usually attached to the surface. 3. X-ray imaging: X-ray barium meal imaging can also be used to identify gastritis, the X-ray sign of gastritis can be manifested as the gastric mucosa is bluntly jagged, and the direct sign of barium in gastric ulcer is the niche shadow and mucosal aggregation. Both gastritis and gastric ulcer can be characterized by epigastric pain, bloating, nausea, acid reflux and other indigestion symptoms. If the above symptoms occur, you should go to the hospital in time to clarify the cause of the disease and follow the doctor’s instructions for treatment.