Cerebral aneurysm is a serious life-threatening disease for patients. It is usually not easily detected if it does not rupture; it is mostly detected when it ruptures and only then is it taken seriously. Current studies have found that unruptured aneurysms account for a significant proportion of the population and are mostly found in people with hypertension, smoking, and patients with atherosclerosis. Recent studies have found unruptured aneurysms in up to 7% of the population requiring cranial MRI in outpatient neurology by cranial MRA screening. Do unruptured aneurysms require treatment? Current evidence suggests that bleeding rates are low below 7 MM, and that the risk of surgery is comparable to the natural risk; those larger than 7 MM require surgery because the risk of bleeding rates is much greater. However, domestic data suggests that most ruptured aneurysms are currently less than 7MM, so the consensus is that surgical treatment should be performed if a definite aneurysm is found. How difficult is it to treat unruptured aneurysms? Compared with unruptured aneurysms, it is definitely safer to treat unruptured aneurysms because ruptured aneurysms have both hematoma and subarachnoid hemorrhage, causing cerebral edema, cerebral vasospasm and cerebral ischemia, which may make intraoperative traction difficult and may aggravate cerebral vasospasm, increasing the rate of death and disability. Unruptured aneurysms, on the other hand, are simple aneurysms without the above-mentioned factors that make surgery difficult. In the past, the timing of surgery for ruptured aneurysms was somewhat conservative, and the risk of surgery was reduced by allowing the blood to be absorbed before surgery; however, some patients lost the chance to be rescued because of rebleeding while waiting for surgery. How to choose the treatment for unruptured aneurysm? Intracranial aneurysms can be treated by interventional or open surgery, both of which have their advantages and disadvantages. Currently, with the rapid progress of interventional surgery, its minimally invasive nature, safety and effectiveness, and relatively small surgical risks are more accepted by patients. How can cerebral aneurysms be detected early? The most accurate diagnosis of aneurysm is DSA examination, and now cranial MRA has become a good alternative examination. Of course, there are some economic barriers for cranial MRA screening (cost 1000 RMB), but for those who have high risk factors, such as headache, hypertension, smoking, atherosclerosis, etc., and are financially acceptable, this test should be performed for early detection and early treatment. How can the general public prevent brain aneurysm? The top doctor should treat the disease before it happens, and this should be controlled from the factors of its development. Controlling blood pressure, preventing arteriosclerosis, preventing overexertion and not smoking are the healthy lifestyles to keep brain aneurysm away from us.