About 2 percent of people have aneurysms, which are weak spots in blood vessels in the brain. They can rupture and cause hemorrhaging.
Researchers in the Netherlands wanted to find potential triggers. They surveyed 250 people who recently suffered a hemorrhage caused by an aneurysm. They found eight activities that appear to make a rupture more likely.
In addition to those mentioned, other trigger activities include getting angry, being startled and smoking. All of the triggers produce sudden, short increases in blood pressure.
This study was published online in the journal Stroke.