Cluster Headache

Definition

Cluster headache is a type of severe, recurring pain that is located on one side of the head. It received its name from the clustering, or pattern, of frequent headaches that usually occur.There are 2 main types of cluster headaches:
  • Episodic—These occur one or more times daily for multiple weeks. The headaches then go away and come back months or years later.
  • Chronic—These occur almost daily with headache-free periods lasting less than a month.
Either type of headache may switch to the other type.

Causes

The cause of cluster headaches is not known. It is thought that there is abnormal activation of the area of the brain that is responsible for regulating temperature, blood pressure, hormone release, and sleep. The pain is thought to be caused by a combination of widening of the blood vessels and inflammation of the nerves of the face.Other possible causes include:

Risk Factors

Men aged 20-50 years are more likely to get cluster headaches. Other factors that may increase your chance of cluster headaches include:
  • Prior head surgery or head injury
  • Family history of cluster headaches

Symptoms

Cluster headaches may cause:
  • Stabbing, penetrating, burning, or explosive head pain that:
    • Begins suddenly
    • Is on one side of the head, but not both
    • Often starts around the eye and spreads to the same side of the head
    • Causes facial flushing
    • Can occur daily or almost every day for multiple weeks
    • Can occur 1-8 times per day
    • Lasts 15 minutes to 3 hours
    • Often occurs at about the same time each day
    • May increase in intensity over time
    • May start within 2 hours of going to sleep
    • Can awaken you from sleep
    • Causes an aura—This can include visual disturbance, visual spots, or the inability to move one side of the body.
  • Restlessness and agitation
  • Nausea
During the headache, other symptoms may occur on the affected side, including:
  • Stuffy or runny nose
  • Redness or watering of the eye on one side
  • Droopy eyelid
  • Constriction of the pupil of the eye
  • Facial swelling and flushing, sweating
  • Sensitivity to light and noise
Symptoms of a Cluster Headache
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Copyright © Nucleus Medical Media, Inc.

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