Posterior traffic aneurysm is a common type of intracranial aneurysm, there is a risk of rupture, once ruptured, the rate of death and disability is very high, so it is serious. 1. If the diameter of posterior communicating artery aneurysm is relatively small, or if the patient is older, has not ruptured and has no obvious symptoms, it can be followed up for observation. 2. If the diameter of posterior traffic aneurysm is large, irregular in shape, and the patient is young, even if it has not ruptured, it needs to be treated surgically, otherwise, once the aneurysm ruptures, it will cause subarachnoid hemorrhage. Subarachnoid hemorrhage carries a high risk of death and disability among survivors. Posterior transportation aneurysms, no matter how big or small, have the risk of rupture and bleeding at any time. It is recommended to go to the hospital and follow the doctor’s instructions for treatment in order to avoid a life-threatening situation.