I have a strange feeling under my stomach it feels all empty and hurts when i stand up. its been hurting since i goy up this morning. what could it be?

Exam needed to know: There are many causes of abdominal pain, some of which can be simply annoying, like constipation, others can be deadly. The best way to make sure it's nothing dangerous is to be examined by a health care provider. Most of the time the cause can be determined with a physical exam and a few simple tests. Less often, an imaging study or looking inside the gut with a scope (endoscopy) is needed.