Cluster Headache

Cluster headache causes extremely severe one-sided head pain, usually around the eye or temple, often with tearing, nasal congestion or eye redness on the same side. Attacks tend to come in clusters over weeks and often follow a strikingly repetitive timing pattern. ^[1][2]

What is Cluster headache?

It belongs to a group called trigeminal autonomic cephalalgias. The pain is often brief compared with migraine but much more intense, and many people feel restless rather than wanting to lie still. ^[1][3]

What are the symptoms and what causes it?

Attacks may last 15 minutes to 3 hours and can happen several times per day. The cause is not fully understood, but hypothalamic and trigeminal pathways are involved. Alcohol can trigger attacks during an active cluster period. ^[1][2][3]

How is it diagnosed?

Diagnosis is based on the headache pattern and associated autonomic signs. Brain imaging may be needed in some situations to exclude secondary causes, especially if the pattern is unusual or the exam is abnormal. ^[1][2]

What are the treatment options?

Acute treatment often includes high-flow oxygen and specific medications such as triptan-based options. Preventive treatment may be used during the cluster period to reduce attack frequency. ^[1][2][4]

Possible complications and when to seek medical care

A new severe headache does not always mean cluster headache. Sudden “worst headache,” neurologic deficits, fever, confusion or head injury symptoms need urgent evaluation. ^[1][2][3]

What may help in daily life?

Tracking time of day, duration and triggers can help confirm the pattern and guide treatment timing. ^[2][3]

Common mistakes during follow-up

Common mistakes include confusing cluster headache with sinus headache and delaying specialist care because attacks are short-lived. ^[2][4]

FAQ

What is cluster headache?

Cluster headache is explained by its symptoms, causes, diagnosis and treatment plan. The most important step is matching the symptoms with the correct medical evaluation. ^[1][2]

When should I see a doctor for cluster headache?

Seek medical review if symptoms are persistent, worsening, recurrent or clearly affecting daily life. Urgent review is needed when warning signs or severe symptoms are present. ^[1][2]

Can cluster headache improve without treatment?

Some mild cases or symptom flares may settle, but not every condition should be watched at home. Improvement does not always mean the underlying problem has been resolved. ^[1][2]

How is cluster headache diagnosed?

Diagnosis usually starts with a medical history and examination, then moves to targeted tests depending on the symptom pattern and suspected cause. ^[1][2]

Why does follow-up matter?

Follow-up helps confirm the diagnosis, assess response to treatment and detect complications or recurrence earlier. ^[1][2]