The recurrence rate is proportional to the size of the aneurysm, i.e., the larger the aneurysm, the higher the recurrence rate. Generally speaking, the recurrence rate after intervention for aneurysms less than 1 cm in diameter is less than 5%-10%; however, the recurrence rate for aneurysms larger than 1 cm in diameter may be as high as 10%-30%. Therefore, regular postoperative review of cerebral aneurysms is particularly necessary. Recurrence is usually concentrated within 2-3 years after surgery, and no recurrence beyond 2-3 years is basically disarmed. However, cases of recurrence 8-9 years after surgery have been reported in the literature. Patients are usually required to be reviewed at least four times after surgery, i.e., once at 3 months, 6 months, 1-2 years, and 3-4 years after surgery. Cerebral angiography (DSA) is preferred for the first two to three reviews, and noninvasive cerebrovascular examinations (e.g., MRA or CTA) can be chosen as a review for subsequent long-term follow-up. For patients with satisfactory aneurysm embolization and no special postoperative discomfort, the review interval can also be appropriately extended and the number of reviews reduced to avoid the side effects of contrast agents and X-rays. The majority of patients who are discharged safely after cerebral aneurysm intervention can resume normal work and life soon, but very few patients may have recurrent disease, especially the following cases need urgent follow-up: 1. severe headache, vomiting or even coma; 2. symptoms of cranial nerve paralysis such as eyelid drooping, eye movement disorder, water choking and coughing, swallowing difficulty; 3. partial body numbness, weakness, aphasia or even hemiplegia. The first two cases are mostly seen in cerebral aneurysm rupture or occupancy after recurrence, while the third case is mostly seen in thrombosis within the main trunk of the aneurysm-carrying artery or its distal branches.