The main symptoms of abdominal aortic aneurysm are pain, pulsatile abdominal mass, compression, rupture, embolization, etc., which are introduced as follows: 1. Pain: abdominal aortic aneurysm can be manifested as distension and pain in the lower back and abdomen, or cut-like pain, and if it is sudden onset of severe abdominal pain, we should be alert to rupture of the tumor. 2. Abdominal throbbing mass: the patient may have a throbbing mass around the umbilicus which is consistent with the rhythm of the heart, and if the diameter of the tumor is more than 4 centimeters, the doctor can observe it through physical examination. 3. Compression: there can be gastrointestinal compression, which manifests as distension and pain in the upper abdomen, poor appetite, etc.; there can be urinary obstruction if the tumor is compressed to the renal pelvis and ureter; obstructive jaundice can be seen when the tumor is compressed to the biliary tract. 4. Rupture: when the tumor ruptures, severe abdominal pain, shock, myocardial ischemia and other serious consequences may occur. 5. Embolism: due to the slow blood flow in the cavity of aneurysm, thrombus is easy to be formed, once the thrombus is dislodged, it will easily lead to arterial embolism in the lower limbs, and produce the symptom of acute limb ischemia. After the diagnosis of abdominal aortic aneurysm, because of the complexity of the condition, rupture may lead to abdominal hemorrhage and other adverse consequences at any time. Therefore, it is necessary to go to a tertiary hospital and follow the doctor’s instructions for treatment.