I'm feeling nausea and belly pain. What are some possible causes?

"Laundry List" Finding out the cause of abdominal pain is like solving a mystery: we collect clues from one's symptoms, history, examination+/- tests. Therefore, a "hands-on" eval is critical. In general, causes of lower abdominal pain and nausea can include irritable bowel, diverticular disease, endometriosis, ovarian cysts, intestinal or gynecologic cancers, urinary tract infections, appendicitis, etc...