Cerebral aneurysms 3 mm usually do not require surgery. However, if the risk of rupture is high or there are obvious clinical symptoms, such as severe headache and nausea, prompt treatment is needed. Cerebral aneurysm 3 mm is relatively small, generally the risk of rupture is reduced, can not be operated for the time being, according to the doctor’s requirements of regular review can be. Patients are advised to live more regularly in their daily life, and if they have high blood pressure in the past, they should take antihypertensive drugs, such as amlodipine, enalapril, etc. as prescribed by the doctor. If the size of the aneurysm is large, or if the risk of rupture is high despite the small size of the aneurysm, or if the patient has obvious clinical symptoms, such as dizziness, headache, nausea, etc., then the patient should follow the doctor’s instructions for surgical treatments, such as aneurysm interventional embolization surgery, craniotomy, and so on. In case of aneurysm, the doctor will choose whether to carry out surgical treatment according to the condition.