Cluster headaches are severe attacks of pain that can last for long periods. You may get them for years, but they're not usually serious and there are treatments that can help.

Cluster headaches are severe headaches that can happen multiple times a day and continue for weeks or months. They may stop for a while (weeks, months or years), or there may be no gap between headaches.

The main symptoms of a cluster headache include:

• a sharp, burning or piercing pain, usually on 1 side of the head, around the eye
• headaches that happen at the same time of year or at set times of the day
• headaches that start and stop quickly, without warning
• pain that can make you feel restless, you may want to walk around or move your body
• headaches that last between 15 minutes and 3 hours

You may also get other symptoms, such as:

• a red and watering eye on the same side as the pain
• feeling sick
• drooping and swelling in the eyelid on the same side as the pain
• a smaller pupil in the eye on the same side as the pain
• face sweating
• a blocked or runny nose

Cluster headaches are rare but some of their common symptoms can be the same as other conditions, such as migraine.

Find out about migraines

See a GP if:

Get an urgent GP appointment or call 111 if:

Call 999 or go to A&E now if:

There are no specific tests to diagnose cluster headaches. A GP will ask you about the pain, location and frequency of your headaches. They’ll also ask about any other symptoms you’re having.

Other conditions can have similar symptoms to cluster headaches. A GP may refer you to a specialist for a brain scan to rule out other possible causes of your symptoms.

There’s no cure for cluster headaches, but a specialist may recommend treatments to help ease and prevent symptoms.

Painkillers, such as paracetamol and ibuprofen, do not work.

Treatments that help during a cluster headache

If a cluster headache has already started, the main treatments include:

• medicines called triptans, given as an injection or a nasal spray
• oxygen, which is breathed through a mask
• using a device to give mild electrical pulses to the back of the neck

Rarely, when other treatments have not worked, you may be offered surgery. This involves implanting a small device to help treat your headaches.

Treatments to prevent a cluster headache

Your GP may prescribe medicines that can help to prevent a cluster headache before it starts.

These can include corticosteroids, verapamil or lithium.

Ask a GP for advice about common triggers. Understanding this may help you to avoid a cluster headache

It’s not known what causes cluster headaches.

They’re more common in men in their 30s and 40s, or if you have a close family member who gets them.

Some people find certain triggers can cause cluster headaches, such as:

• smoking
• drinking alcohol
• perfume
• the smell of paint, nail varnish or petrol
• exercise

Keeping a headache diary may help you to understand your triggers.

• OUCH UK
• The Migraine Trust: cluster headache