Cluster headaches are
typically very short in duration and are usually felt on one side of the head
behind the eyes.
Cluster Headaches
Cluster headaches are
typically very short in duration, excruciating headaches, usually felt on one side
of the head behind the eyes. Cluster headaches affect about 1 million people in
the United States and, unlike migraines, are much more common in men. This is
the only type of headache that tends to occur at night. The reason that they
are called 'cluster' headaches is that they tend to occur one to four times per
day over a period of several days. After one cluster of headaches is over, it
may be months or even years, before they occur again. Like migraines, cluster
headaches are likely to be related to a dilation of the blood vessels in the
brain, causing a localized increase in pressure.
