What are the reasons for causing Abdominal Pain?

Gastroesophageal reflux disease (acidity, heartburn, vomiting)
Dyspepsia (gas, bloating, distension of abdomen)
Irritable bowel syndrome ( mucus in stools, chronic diarrhea, loose bowel movements/constipation)
Loss of appetite/weight loss
Inflammatory bowel disease, e.g., ulcerative colitis/Crohn’s disease.
Elevated SGOT, SGPT levels (could be due to chronic Hepatitis B or C, non-alcoholic fatty liver disease)
Difficulty in swallowing
Acute Pancreatitis/Chronic Pancreatitis
Malabsorption syndrome
Celiac disease