They run in families, but it's not clear why some people get cluster headaches and others don't.

A shot of sumatriptan works very well to stop a cluster headache.

Do not use this medication to treat a cluster headache.

These medicines are usually tried with another medicine to prevent cluster headaches.

Lidocaine has a small effect on pain for most people with cluster headaches.

Oxygen therapy is one of the best treatments to stop a cluster headache.

The cause of cluster headaches is unknown, but they may have some genetic component.

A cluster headache typically awakens a person from sleep one to two hours after going to bed.

It is not clear exactly how verapamil works to prevent cluster headaches.

People with cluster headaches cannot sit or lie still.