Arterial hemangiomas are benign tumors that generally have little effect on the body if they do not rupture and bleed. However, because of the local weakness and reduced tension of the vessel wall in an aneurysm, the abnormal vessel wall forms an abnormal expansion or bulge under the impact of blood flow, and the aneurysm continues to increase in size, which may rupture at the weak point and cause hemorrhage, which is serious and may be life-threatening. Although arterial hemangiomas can occur in all parts of the blood vessels, the common site is the aorta or cerebral artery. Most aortic or cerebral artery hemangiomas are serious emergencies. Most of the symptoms of aneurysms are not obvious and can be surgically treated and removed if they are found before rupture; if the pain attack is sudden, persistent and intense, and can be accompanied by profuse sweating, nausea, hypotension and shock, rupture of the aneurysm should be considered, and emergency surgery should be performed if rupture occurs or if the aneurysm is located at an operable site. Because aneurysm may rupture and bleed, in addition to thrombus or plaque, which may be dislodged and free to form embolus, it may rupture and bleed at any time in an irregular and unpredictable location, so it is a serious disease in clinical practice. Therefore, if an aneurysm is found, it should be treated promptly to avoid life-threatening consequences.