Pain or burning feeling in upper abdomen just bellow the breast bone, during or soon after a meal can indicate a case of gastritis or stomach ulcer (the stomach acid produced during meal irritates the stomach lining defect or ulcer).
She may have additional symptoms like feeling bloated, belching, heartburn, early satiety, nausea, vomiting.
Chronic use of pills like non steroidal anti inflammatory drugs is risk factor for stomach lining irritation and defects.
Testing and treatment for H.pylori infection is important.
Best wishes!
Marija