People who suffer from migraines can find that different "triggers" in different people may get a headache started.

VOA: special.2009.03.18

After all, when is a headache bad for me?

毕竟，什么时候头疼对我来说有坏处？

耶鲁公开课 - 死亡课程节选

One effect of this lack of oxygen to the brain is a headache.

VOA: special.2009.07.14

Such a headache causes severe pain that goes away but returns later.

VOA: special.2010.03.30

Today,Mister Croley says months can pass without a headache.

VOA: special.2010.03.30

"Even if their eyes start to feel uncomfortable or they start to get a headache, they're less likely to tell their parents, because they don't want to have the game or the computer or whatever taken away."

VOA: special.2011.08.01

Eighty to ninety percent of cluster headache patients have pain over a number of days to a whole year.

VOA: special.2010.03.30

The Mayo Clinic says you may feel a tension headache as tightness in the skin around your eyes.

VOA: special.2010.03.30

The Cleveland Clinic in Ohio says the cluster headache can be many times more intense than a migraine.

VOA: special.2010.03.30

A tension headache can last from a half hour to a whole week.

VOA: special.2010.03.30

The group suggests steps to ease or end a tension headache.

VOA: special.2010.03.30

The US Headache Consortium is a group with seven member organizations.

VOA: special.2010.03.30

The group now calls it a tension-type headache.

VOA: special.2011.05.03

A migraine headache can cause disabling pain.

VOA: special.2009.03.18

"Our study showed for the first time a clear difference between oxygen and air in the treatment of acute cluster headache.

VOA: standard.2009.12.17