The main characteristic of vomiting due to duodenal ulcer is postprandial vomiting. Generally, patients with duodenal ulcers are prone to pyloric obstruction. When a large meal is consumed, pyloric obstruction may occur, preventing stomach contents from passing into the duodenum, leading to vomiting. Additionally, patients might also experience vomiting of acidic stomach contents while fasting. After vomiting, patients with duodenal ulcers can use acid-suppressing medications to alleviate gastric edema and medications like mosapride to promote gastric motility. (Medication should be used under the guidance of a physician.)