Duodenal inflammation is one of the diseases whose symptoms differ from one person to another. What you feel may not be felt by others, but it may cause a number of common symptoms such as:

• Feeling of vomiting and nausea.
• Stomach pain, especially heartburn.
• Indigestion.
• Feeling full even when eating small amounts of food.
• bulges.
• flatulence
• feeling tired
• Anemia caused by iron deficiency.

As for shortness of breath, it is not a known symptom of duodenitis, but it may occur as a result of indigestion and heartburn, which is a symptom of duodenitis.