To diagnose the condition, the doctor will need to perform a thorough examination of the abdomen. He or she will also check the pulse points of different areas of the body, especially in the lower extremities. When a mass in abdominal area, combined with a stiffened abdomen that displays a pulsing sensation is presented, it could mean that either a rupture of the aorta is imminent or that it has already occurred. Using ultrasonography, the presence of an abdominal aneurism can be confirmed. As further confirmation, an angiogram may also be required. This is performed through the injection of dye directly into the artery using a thin tube called a catheter. The catheter, after inserted into the artery, is then fed through the artery until it reaches the aorta in question. If present, the dye will clearly outline the aneurism that will be visible to the doctor in an x-ray.

When the presence of an aneurism through a routine examination where a pulsating abdomen condition is noted, it can generally be treated without surgery. Controlling blood pressure will be the first course of action. Large aneurisms have a greater risk of rupturing, and may warrant surgery to remove it if the individual is in general good health.

For individuals who are diagnosed with abdominal aneurisms, close monitoring of these anomalies will be conducted to ensure they do not worsen. In some cases, further treatment including surgery may be indicated. While common and usually not serious, any aneurism should be considered as a potential threat.