Why does smoking cause brain aneurysms more than alcohol does?

Brain aneurysms can be caused by disease, injury or a congenital defect and have also been linked to certain risk factors, such as head trauma or drug abuse. ... read more

Researchers have confirmed three gene changes that raise the risk that a blood vessel in the brain will weaken and balloon out (aneurysm), creating a life-threatening chance of rupture. Smoking, the biggest risk factor for brain aneurysm, is five times more dangerous in people with these gene variations. read more

Researchers say smoking may cause the brain's blood vessels to develop multiple aneurysms, or weak spots. These weak spots can rupture and cause bleeding that can lead to stroke, disability, and death. Doctors note that half the patients who suffer a ruptured aneurysm in their brain will die. Most of the survivors have permanent disability. read more

High alcohol content in the blood is directly affecting the composition of blood leading to the unsteady flow of blood to the brain. This causes the small junction arteries to form a weak spot which balloon out and get filled with blood. read more