Aortic narrowing may cause aneurysm, which is mainly due to the abnormality of blood vessel wall and the impact of blood flow, and needs timely treatment. 1. The main reason for the formation of aneurysm is the acquired pathological changes and congenital structural abnormalities of the arterial wall, which cause the tension of the vascular wall to be reduced and weakened, and under the impact of blood flow, abnormal expansion of blood vessels will be formed, which is called hemangioma. 2. Aortic constriction belongs to pathological changes, the narrowed local blood vessels under the impact of arterial blood flow will appear abnormal expansion, after a long time of abnormal expansion will form a local aneurysm. 3. Therefore, aortic narrowing may form aneurysms, and it is recommended that patients should be detected and treated as early as possible.