Hi, there are somany causes for abdominal pain like Appendicitis,Crohn's disease,Diabetic ketoacidosis (high levels of ketones in the blood), Diverticulitis, Injury,Intestinal obstruction,Intussusception (in children),Irritable bowel syndrome Lead poisoning,Mesenteric lymphadenitis (swollen lymph nodes in the folds of membrane that hold the abdominal organs in place),Pancreatitis (pancreas inflammation) Peritonitis (infection of the abdominal lining),Sickle cell anemia,Strained or pulled abdominal muscle,Thoracic aortic aneurysm Ulcerative colitis,Uremia (buildup of waste products in your blood),Urinary tract infection (UTI),Viral gastroenteritis (stomach inflammation)etc. gas pains or a pulled muscle, aren't serious.chronic abdominal pain needs complete evaluation. Go for complete blood count, urine routine,xray abdomen, CT abdomen and endoscopy if needed.consult general surgeon or gastroenterologist for furthur care and treatment