Stage A2 duodenal ulcer usually takes one to two months to reach clinical healing, and the healing time is different for each individual. Stage A2 duodenal ulcer represents an ulcer in the active stage, with gastroscopic manifestations such as necrosis of the ulcer surface and congestion and edema of the surrounding mucosa. Duodenal ulcers may be related to the invasive effect of gastric acid and pepsin as well as Helicobacter pylori infection and medications. There may be epigastric pain, acid reflux and heartburn during fasting. Duodenal ulcer A2 stage can take omeprazole, ranitidine and other drugs to inhibit the secretion of gastric acid; you can also take aluminum sulfate, colloidal bismuth pectin and other drugs to protect the gastric mucosa; if there is Helicobacter pylori infection, you can also be based on the above medications with amoxicillin, metronidazole, clarithromycin, and other antibiotics, with a history of allergy to the above medications, pregnant women, and patients with severe damage to the liver and kidney function is not recommended. The duodenal ulcer A2 stage of the general treatment for about two months can achieve clinical cure, but each person’s physique and the severity of the ulcer is different, so the healing time is also different, the specific situation also need to gastroscopy review results to judge. The above drugs need to be taken under the guidance of a doctor, it is not recommended to take medication on their own, but also need to regularly review the gastroscope, Helicobacter pylori breath test and other items.