Hello, Most probably an acidity and gastritis. Does she also have upper abdominal pain, nausea, bloating, burping, increase in pain on food, sour water feeling in throat or chest burning, these are the other symptoms and may be associated. She should avoid fatty, oily and spicy diet. Have some walk after having food instead of taking rest. Have multiple small meals instead of heavy meals. Have regular sleep habits and avoid stress. Lots of green leafy vegetables, fruits. She should get prescribed tab Rantac 150 mg twice a day for week. If not adequately relieved, then you should add Syr sucral O or gelusil two teaspoon three times a day for a week. Hope this helps you and get back if you have any doubts.