Intracranial aneurysms are weakened, bulging spots on the wall of the cerebral arteries. The etiology of aneurysms is not fully understood, but congenital, external, and genetic factors are mentioned in the literature as possible causes. Intracranial aneurysms can be classified using several schemes. The most obvious division considers separately ruptured and non-ruptured lesions. Non-ruptured intracranial aneurysms are weakly dilated areas on the main bifurcation cerebral arteries. There are many risk factors for the development of intracranial aneurysms, both inherited and acquired, and those related to possible aneurysm rupture include the size and location of the aneurysm. Although small aneurysms have a low risk of rupture, most cases of subarachnoid hemorrhage come from small aneurysms, because small aneurysms are much more common in the general population than large aneurysms; the so-called risk paradox. Therefore, it would be useful to know for which small aneurysms there is a risk of rupture so that preventive treatment can focus on those small aneurysms. The clinical presentation of a cerebral aneurysm can be detected accidentally, by diagnostic methods unrelated to the aneurysm, and by imaging studies obtained for symptoms that may or may not be associated with the presence of an unruptured aneurysm or may appear with signs and symptoms at the time of aneurysm rupture. Treatment of intracranial aneurysms can be divided into treatment of an unruptured aneurysm and treatment of a ruptured aneurysm, and includes endovascular or surgical techniques. The nurse has an extremely important role in preventing rupture of the aneurysm because by performing nursing interventions it can greatly reduce the risk of the same. Preventive interventions related to risk reduction for aneurysm rupture are aimed at changing the modifying risk factors.