An aneurysm is a weak point in a blood vessel wall or cardiac chamber. It is a bulge in an artery. An aneurysm can occur in any part of the body. There are two types of aneurysm- aortic and cerebral.Aortic aneurysm is the most common type of aneurysm. The aorta is the body's largest artery. It carries blood from the heart to every organ except the lungs.Cerebral aneurysm occur in an artery in the brain. This can lead to numbness in the face or problems with the eyes. It can be treated with surgical clipping or endovascular coiling.