Aneurysms are caused by a weakness in the walls of blood vessels. The exact cause isn't always clear, but several factors can contribute to their development. Some of the causes and risk factors for aneurysms include:
- Weakness in the blood vessel wall present from birth (congenital aneurysm)
- High blood pressure (hypertension) over many years, resulting in damage and weakening of blood vessels
- Fatty plaques (atherosclerosis) resulting in a weakness of the blood vessel wall
- Inherited diseases that may result in weaker than normal blood vessel walls
- Trauma, such as a crush injury to the chest
- Smoking, which is a risk factor for the formation and rupture of aneurysms
- Drug use, particularly using cocaine, which raises blood pressure
- Heavy alcohol use, which can also increase blood pressure
- Inherited connective tissue disorders, such as Ehlers-Danlos syndrome, which weaken blood vessels
- Polycystic kidney disease, which increases the risk of cerebral aneurysm
- Infection, such as syphilis, if untreated
These factors can weaken the blood vessel walls, leading to the formation of aneurysms. A family history of aneurysms can also increase the risk of developing one. Additionally, age, sex, and certain lifestyle factors can contribute to the risk of aneurysm development
