What is the most common symptom of an abdominal aneurysm?

The most common symptom of an abdominal aneurysm is the presence of a pulsating mass above the umbilicus. This symptom arises because an abdominal aortic aneurysm occurs when there is a dilation or bulging in the wall of the abdominal aorta, which can sometimes be felt as a pulsation. The mass can often be visualized or palpated during a physical examination, especially if the aneurysm is large enough.

Typically, patients may be asymptomatic until the aneurysm becomes significantly enlarged or ruptures; however, when symptoms do occur, the pulsating mass is a classic indicative sign. Other signs, such as pain in the lower back, might also manifest, but the pulsating mass is more directly associated with the condition itself and is a crucial clinical finding that can lead to further imaging and diagnosis.