Hello. Distension of abdomen due to constipation and then release of that accumulated has meanwhile may be the cause but gall stones can also cause this symptom because gall bladder helps digest fats in your diet. Endoscopy is good option to look for stomach acidity or ulcer which can this symptom. You must better avoid constipation by taking a lot of vegetables and fluids plus fruits. You must decrease fat content in your diet including beef(if u take more of it) Isapghol husk mixed with water or milk will be a good idea. Syp gaviscon after meals will also help. If ultrasound show gall stones then better to visit a surgeon for operation of gall bladder. Hope that answer the question. Thanks