** Thanks for contacting with your health concern 1. as her age can t be deduced thus certain points to remember are: . As the age progresses people tend to produce less acid [HCl] called as hypochlorhydria resulting in impaired/slower digestion. ii. Lactose intolerance. iii. vitamin B12 deficiency [intrinsic factor] level also decrease as the age progress and thus they are more prone to atrophic gastritis [present] 2. So it is best to put her on a dietary regime which is free from causing stomach upset/burping, like - Lactose-free product like soy milk, lactose-free milk, potato, rice, barley, margarine without butter/milk, fruit and vegetable juice, plain herbs and spice, jellies, jams - maintain a diet with low glycemic index/low fat. - eat smaller meals regularly and chew food thoroughly. - take a multivitamin which includes B3 and B12. . increase intake of fiber and omega 3 fatty acids. PS. going by your history and symptoms, the most probable diagnosis could be functional IBS [irritable bowel syndrome] which is a collection of symptoms ranging from bloating, diarrhea, abdominal pain, and constipation, so consult a Gastroenterologist for necessary examination and investigation, till then . maintain proper hydration [to prevent dehydration] and replace with electrolytes [avoid apple, grapes, pear juice which can make stomach upset]. - Avoid fiber-rich diet, since it can make bloating worse [instead take plain white rice, boiled potato, plain toast] - avoid eating dairy products, spicy food, and spicy condiments, stay away from artificial sweeteners. - take less of strong spices (ginger, garlic), oily-fried-fatty food and flatus producing foods (peas, beans, dals) - eat slowly, avoid haste-irregular eating and sweet/heavy food which are difficult to digest and cause indigestion - since it is a psychosomatic disease thus tranquility of mind is must, as such Medhya drugs or a mild tranquilizer are useful. PS. If symptoms persist, call your doctor since it can be symptoms of underlying illness or infection which require medical intervention.