Bouts of frequent attacks, known as cluster periods, may last from weeks to months, usually followed by long periods of relief (remission). During remission, attacks may stop for months or years.

Pain is severe on one side of the head, accompanied by symptoms such as nasal discharge, or red or tearing eyes.

Injected medications, inhaled oxygen, steroids, and preventive medications can help.

Headaches that occur in patterns or clusters.

Consult a doctor for medical advice

Sources:  Mayo Clinic and others.


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Cases per year

More than 200,000 US cases per year

Treatable by a medical professional

Requires a medical diagnosis

Lab tests or imaging not required

Chronic: can last for years or be lifelong

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