The treatment of 2mm cerebral aneurysm must be chosen according to the situation, because the risk of rupture is relatively small in this case, and if surgery is forced, there may be a risk of intraoperative rupture and bleeding. However, during the conservative treatment period, it is important to review regularly, keep the blood pressure in a relatively stable state, lower the blood lipids and blood sugar, and actively review the diet structure. If the aneurysm has a tendency to increase in size at a later stage, and may even have a high risk of rupture in a short period of time, then it is necessary to actively carry out the corresponding surgical treatment, and most of them can be treated by spring coil embolization, and some can also apply stent-assisted embolization. However, if the aneurysm is in a special location, such as the carotid siphon, it can even be treated by direct application of overlapping stents; it is also important to clarify what type of brain aneurysm it is, especially in the case of blister-like aneurysms, which are also very well treated by direct application of overlapping stents.