Different reasons for abdominal pain include, but are not limited to, acid indigestion after consuming, gallstones and gallbladder swelling (cholecystitis), pregnancy, gas, inflammatory bowel condition (ulcerative colitis and also Crohn's illness), appendicitis, abscess, gastritis, gastroesophageal reflux condition (GERD), pancreatitis, gastroenteritis (microbial or viral), bloodsucker infection, endometriosis, kidney rocks (nephrolithiasis), stomach muscle injury, abdominal rupture, lactose intolerance, gluten intolerance (celiac condition), food poisoning, menstrual cramps, peritonitis, serositis, ischemic digestive tract illness, vasculitis, abdominal aneurysm, abdominal organ injury from trauma, as well as constipation. Gastritis is a general medical term for any moderate irritability, inflammation or infection of the belly cellular lining. Acute gastritis takes place as an unexpected assault that can last from a couple of hrs to a few days. Chronic gastritis, which is fairly typical among the elderly, can happen over an extended period as well as might produce comparable signs and symptoms or only light pain, in addition to anorexia nervosa as well as queasiness. If you develop a hurting or stabbing discomfort or stress in the upper abdominal area just under the ribs, this might indicate a heart-related trouble, says Kristine Arthur, MD, internist at Orange Coast Memorial Medical Center in Fountain Valley, CA.