
Pain in
duodenal area (slightly right from the middle of upper
stomach) is mostly from
duodenal ulcer. Avoid anything acidic: fruits, fruit juices, vitamin C, aspirin (!!), vinegar, wine, also spices, alcohol, caffeine. Some say, that black tea helps in pain.Have frequent small portions, when you eat.
If it really is ulcer, it can be diagnosed only with gastroduodenoscopy, and then treated with appropriate drugs.