Final answer:
An ulcer is a disease that may cause sores in the duodenum. It can be caused by various factors such as infection or excessive acid production. Symptoms include abdominal pain, indigestion, and bloating.
Step-by-step explanation:
The disease that may cause sores in the duodenum is Ulcer. An ulcer is a sore that forms in the lining of the stomach or duodenum. It can be caused by various factors such as infection with Helicobacter pylori bacteria, long-term use of NSAIDs, excessive acid production, or stress. These sores can cause symptoms like abdominal pain, indigestion, and bloating.
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