Abdominal pain can be caused by a wide range of conditions because it’s a symptom associated with many different bodily processes. Common causes include gas, indigestion, constipation, stomach flu, food poisoning, and gastroesophageal reflux disease (GERD). Other, more serious causes can include appendicitis, gallstones, kidney stones, urinary tract infections (UTIs), and conditions like irritable bowel syndrome (IBS), Crohn’s disease, or ulcerative colitis. The specific cause of abdominal pain can often be determined by its location, severity, and accompanying symptoms.