Are aortic aneurysms usually painful?

See below: They're usually asymptomatic until they rupture, then they are very painful.

Can be: Depends on where they are, and if they are not tearing. When an aneurysm begins to dissect (tear) there can be a burning or ripping severe back pain. If the aneurysm is in the abdomen, it can cause abdominal pain. If it ruptures (breaks open) it is very painful, and can be fatal within hours if not fixed.