Changes

The most frequent reasons for abdominal pain are [[gastroenteritis]] (13%), [[irritable bowel syndrome]] (8%), urinary tract problems (5%), [[gastritis|inflammation of the stomach]] (5%) and [[constipation]] (5%).<!-- <ref name=Vin2014/> --> In about 30% of cases, the cause is not determined.<!-- <ref name=Vin2014/> --> About 10% of cases have a more serious cause including gallbladder ([[gallstone]]s or [[biliary dyskinesia]]) or [[pancreas]] problems (4%), [[diverticulitis]] (3%), [[appendicitis]] (2%) and [[cancer]] (1%).<ref name=Vin2014>{{cite journal|last1=Viniol|first1=A|last2=Keunecke|first2=C|last3=Biroga |first3=T|last4=Stadje|first4=R|last5=Dornieden|first5=K|last6=Bösner|first6=S|last7=Donner-Banzhoff|first7=N|last8=Haasenritter|first8=J|last9=Becker|first9=A|title=Studies of the symptom abdominal pain--a systematic review and meta-analysis.|journal=Family Practice|date=October 2014|volume=31|issue=5|pages=517–29|pmid=24987023|doi=10.1093/fampra/cmu036}}</ref> More common in those who are older, [[mesenteric ischemia]] and [[abdominal aortic aneurysm]]s are other serious causes.<ref name=":0">{{cite journal|last1=Spangler|first1=R|last2=Van Pham|first2=T|last3=Khoujah |first3=D|last4=Martinez|first4=JP|title=Abdominal emergencies in the geriatric patient |journal=International Journal of Emergency Medicine|date=2014|volume=7|pages=43|pmid=25635203 |doi=10.1186/s12245-014-0043-2 |pmc=4306086}}</ref>
 
===By system===
A more extensive list includes the following:
* Gastrointestinal