Diagnosis of peptic ulcer is mainly through the following tests: 1. The most reliable method to diagnose peptic ulcer is gastroscopy. Gastroscopy can visually see the ulcer, can determine the stage of the ulcer, and can also determine benign and malignant. Gastroscopy is generally divided into general gastroscopy and painless gastroscopy, general gastroscopy that is no general anesthesia for the patient, the patient is awake in the state of intubation. Painless gastroscopy is a gastroscopy performed under general anesthesia, which is better tolerated by patients. After a period of medication, the efficacy can also be judged by re-examining the gastroscope; 2. Helicobacter pylori test. A piece of gastric mucosa is clamped through the gastroscope for HP testing; 3. Barium meal test. The patient swallows barium and then has an X-ray taken, and the doctor interprets the X-ray to confirm the diagnosis.