An enlarged area in the lower part of the aorta, a major blood vessel.
A ruptured abdominal aortic aneurysm (AAA) can be life-threatening. Tobacco may increase the risk of an AAA.
An AAA often grows slowly, without symptoms. As it grows, some people may notice a pulsating feeling near the navel. Pain in the back, belly, or side may be signs of impending rupture.
Stopping smoking may slow their growth. Small ones may only need monitoring. Larger ones often require surgery.