A brain aneurysm is not a real tumor, but it is more dangerous than a tumor because it can “explode” at any time. It is an acute and serious disease in neurosurgery, and doctors usually compare it to an “untimely bomb growing inside the head” because it is impossible to predict accurately when a brain aneurysm will grow, when it will rupture, and how dangerous it will be after rupture. If it ruptures, it can endanger the patient’s life. So, what kind of disease is a brain aneurysm? How to prevent and treat it early? Because cerebral aneurysms have almost no symptoms when they do not rupture, they are easily overlooked or treatment is delayed. However, once ruptured, patients may experience severe headache, vomiting, or even coma. Therefore, once symptoms such as unexplained headache and stiff neck appear, you should seek medical attention immediately and get timely treatment through intervention and surgery. “Severe headache” is the most common clinical manifestation of a ruptured aneurysm, described by patients as “the most severe headache in my life”, accompanied by nausea and vomiting, and even loss of consciousness. In addition, the gradual enlargement of the aneurysm and compression of the adjacent nerves may cause some related symptoms, such as inability to open one eye, double vision, or paralysis of the affected arteriolar nerve, which is manifested by inability to lift the eyelid and protrusion of the eyeball. When the above symptoms appear, you should go to a major hospital in time to avoid missing the best time for treatment. Doctor’s tip: There is no doubt that all cerebral aneurysms need active medical intervention because of the risk of rupture and bleeding. Any factor that causes a sudden increase in blood pressure can trigger aneurysm rupture.