(Disclaimer: This article is for scientific purposes only, and the information in the following content has been processed to protect the patient’s privacy) Abstract: This is a case of an elderly male who presented to the emergency room with abdominal pain and distension for 1 week, which worsened for 1 day. Routine examination in the emergency room ruled out the possibility of acute abdomen, and an enhanced CT examination revealed abdominal aortic aneurysm formation. After admission, the patient was given anti-inflammatory, acid-suppressing and other symptomatic treatments, and the symptoms were gradually relieved. In order to clarify the situation of the aneurysm, the abdominal aortic CTA was perfected, suggesting that the abdominal aortic aneurysm was accompanied by appendage thrombosis. Basic information] Male, 66 years old [Disease type] Abdominal aortic aneurysm, peptic ulcer [Consultation hospital] Liaoning Provincial People’s Hospital Hospital [Consultation time] March 2022 [Treatment plan] medication (cefixime anti-inflammatory + pantoprazole sodium acid suppression + scopolamine antispasmodic) [Treatment cycle] inpatient treatment for 7 days, 1 month outpatient review [Treatment effect] the patient’s abdominal pain and abdominal distension symptoms relieved I. Initial interview In March 2022, a 66-year-old male patient came to the emergency department of our hospital because of abdominal pain and abdominal distension for 1 week, aggravated for 1 day. The patient had abdominal pain in the upper middle and lower left abdomen 1 week ago, accompanied by abdominal distension and hunger, and the symptoms were aggravated by alcohol consumption and satiety, which were significantly aggravated 1 day ago, and the emergency examination of blood amylase, lipase, cardiac enzymes and other indexes did not show any obvious abnormality, with the exception of acute abdominal disease, cardiac infarction, pulmonary infarction, and aortic coarctation, etc. The patient underwent whole abdomen enhanced CT in emergency. Emergency whole abdomen enhanced CT suggested: abdominal aortic aneurysm formation. The patient had a history of hypertension without systematic treatment, and his blood pressure was 170-180 mmHg, with no history of diabetes, heart disease, or cerebrovascular disease. He complained that he had smoked for 40 years, with 20 cigarettes/day, and that he had consumed alcohol for 40 years, with 3 taels/day. The patient’s diet was fine, sleep was poor, constipation, urination was normal, no significant weight loss, and then he was admitted to the hospital with abdominal aortic aneurysm. The patient was admitted to the hospital to complete the relevant examinations, because the patient had unexplained abdominal pain and bloating, continue to investigate the cause, review blood amylase, lipase, cardiac enzymes, etc. did not see obvious abnormalities, blood routine, liver and kidney function, ion did not see obvious abnormalities, fasting blood glucose 8.81 mmol / L, considerations related to the patient’s state of stress. In order to clarify whether the abdominal pain was related to abdominal aortic aneurysm, CTA of abdominal aorta was performed, and the results suggested that abdominal aortic aneurysm formation was accompanied by epiphyseal thrombus, and the openings of abdominal trunk, both renal arteries, and superior mesenteric artery were normal, and the lumen of the pipe did not see obvious stenosis or dilatation. The cause of the patient’s abdominal pain was not related to the abdominal aortic aneurysm. Relevant departments were asked to consult, considering the possibility of peptic ulcer, and the patient was given cefixime anti-inflammatory, pantoprazole sodium acid suppression, scopolamine antispasmodic, and the patient’s abdominal symptoms gradually decreased after drug treatment. Because the maximum diameter of abdominal aortic aneurysm is 3.1cm, not yet reached the indication of surgery, it is recommended that the patient be followed up for observation, regular review of CTA, absolute smoking cessation, blood pressure control. The patient’s symptoms were relieved after medication, abdominal pain and distension gradually disappeared, and there was no obvious complaint of discomfort after 1 week. When the patient was discharged from the hospital, the whole abdomen enhanced CT was reviewed, and it was seen that the size of the abdominal aortic aneurysm had not changed significantly compared with that of the previous one, and there was no rupture sign, so he was allowed to be discharged from the hospital, and was instructed to be reviewed in the clinic one month after discharge, and the patient complained of no obvious discomfort at the time of the review. Fortunately, the patient’s aneurysm was found in time, and it is still relatively small and has not formed serious consequences. However, after that, the patient should pay attention to the following matters in his life: 1. It is recommended that the patient should quit smoking and drinking, and strictly control his blood pressure, and it is recommended that it should be controlled at 120/80mmHg or below. 2. Maintain good living habits, do not stay up all night, pay attention to the combination of work and rest and avoid being angry and impatient, and keep a happy mood. 3. 3, can be appropriate aerobic exercise, such as jogging, walking, etc., to enhance their own immunity, but avoid intense exercise; 4, dietary consumption of high-vitamin, high-fiber, high-protein food for the body to supplement nutrients, to avoid eating spicy, stimulating, deep-fried food, to maintain smooth bowel movements; 5, be sure to comply with the doctor’s instructions for regular re-examination, to observe the size of the aneurysm, to avoid delays in the treatment. V. Personal perception Aneurysm is a common disease in vascular surgery, especially abdominal aortic aneurysm represented by aortic aneurysm, once ruptured the consequences are unimaginable. Surgery is the only effective treatment, however, not all patients need surgical treatment. If the aneurysm of the patient in this case is found relatively early, small aneurysms or micro aneurysms can be observed through regular clinical follow-up, and their growth rate can be controlled by controlling blood pressure and absolute smoking cessation, etc. It is worth noting that conservative treatment cannot solve the problem at the root, and if it is compatible with surgical treatment and there is no contraindication to surgery, it is still recommended to actively undergo surgical treatment.