​Differential diagnosis of epigastric pain
-functional dyspepsia 
-physical abuse
-sexual abuse
-gastric volvulus 
-rupture of esophagus 
-intestinal ischemia 
-pregnancy 
-abdominal hernia 
-pneumonia 
-pericarditis 
-myocardial ischemia 
-H pylori infection 
-cholangitis 
-choledocholithiasis 
-cholelithiasis
-Parasitic infection 
-gastric cancer
-malabsorption 
-lactase deficiency 
-gastroparesis
-drugs such as 
*theophylline
*digoxin
*corticosteroids
*metronidazole
*macrolides
-indigestion form overeating high fat food
-coffee
-pancreatic cancer 
-pancreatitis 
-pernicious anemia 
-gastritis 
-gastroesophageal reflux
-peptic ulcer disease
- non ulcer dyspepsia

​Differential diagnosis of abdominal aortic aneurysm 
-musculoskeletal pain 
-bowel obstruction
-intestinal ischemia 
-gastritis 
-pyelonephritis 
-urinary calculi 
-pancreatitis pseudocyst 
-pancreatitis 
-pulmonary embolism 
-myocardial infarction 
-ventricular fibrillation 
-diverticulitis
-peptic ulcer

Differential diagnosis of Non mechanical causes of abdominal pain 
-Mechanical ventilation 
-Haemorrhage
-Renal colic 
-Pain medication 
-Embolism 
-Severe pain 
-Sepsis
-Thrombosis 
-Empyema
-Pneumonia 
-Peritoneal inflammation 
-Neoplasm 
-Osteomyelitis of spine
-Perforated ulcer
-Pancreatitis 
-Infection 
-Hypokalemia,
-Uremia
-Bile 
-Lead poisoning