What are clinical features of duodenal ulcers?

Burning gnawing epigastric pain that occurs with an empty stomach: Pain is relieved within 30 minutes by food. Nighttime awakening (when stomach empties) Nausea, vomiting Zollinger–Ellison (ZE) syndrome: gastrin-secreting tumor in or near the pancreas. 0.1–1% of patients with ulcer. 20% of ZE patients have associated multiple endocrine neoplasia 1 (MEN-1). Two thirds are malignant. Diarrhea is common. Can see jejunal ulcers