I understand and appreciate your concerns. Acute catarrhal and erosive duodenitis usually don’t require treatment. With a proper regime disappear within several days. But in the case of repeated manifestations of the disease can pass to a chronic form. Within 10-12 days, you must adhere to the most sparing diet. Food you need to take 4-5 times a day in small portions. Excluded from the diet of all products, irritating the mucosa (spicy and fried foods, spices, pickles, fresh bread and bakery products, vegetables). Allowed pureed soups from rice, manna croup, liquid porridge, scrambled eggs (no more than 3 per day). Because the nature of course duodenitis diverse and similar to many diseases of the gastrointestinal tract, its diagnosis is based on instrumental methods of research:fibrogastroduodenoscopy(EGD),biochemical examination of blood. In this case it is necessary to visit the gastro-hepatologist. All the best.