What are Cluster Headaches?
Cluster headaches are one of the rarest and most severe headache conditions, affecting around 0.1% of the population. Clinical literature consistently describes them as among the most intense pain experiences a person can have. During an attack, sufferers are often unable to stay still, pacing, rocking, or pressing on the affected area in an attempt to manage pain that can last anywhere from 15 minutes to three hours. Attacks typically occur in cyclical patterns or ‘cluster periods’, hence their name.
These severe headaches belong to a category of primary headache disorders known as trigeminal autonomic cephalalgias (TACs).
If the cluster period is followed by a period of remission (where you are headache-free for weeks, months, or even years), this is known as episodic cluster headache. If the period lasts for a year or longer without a break, this is known as chronic cluster headache.
Symptoms of a Cluster Headache
For most sufferers, severe pain from cluster headaches only affects one side of the head (most commonly around, behind, or above the eye and/or temporal region).
The duration of an attack may range between 15 minutes and three hours, occurring anywhere from eight times a day to once every second day. They typically occur at night or in the early hours of the morning, and often at the same time each day.
Other symptoms that may be experienced include:
- Sharp or stabbing pain around one eye
- Pain that radiates around the face, head, and neck
- Restlessness (some people try to relieve their pain by pacing, rocking back and forth in a hot shower, or even banging their head against a wall)
- Difficulty breathing
- Bloodshot and irritated eye
Watery eye - Nasal congestion or a runny nose
- Swelling around the eye
- Droopy eyelid
- Forehead or facial sweating
- Agitation
- Pale or flushed face
Causes of Cluster Headaches
Research into cluster headache has identified a disorder in the upper cervical spine as a primary contributing factor. Dysfunction at this level can result in sensitisation of the brainstem, which is now understood to be central to the mechanism driving cluster attacks. This is also why manual therapy targeting the upper cervical spine, particularly the Watson Headache® Approach, is a clinically relevant treatment pathway for this condition.
Other contributing factors may include a trigeminocervical complex (TCC), where there has been an injury or overstimulation to the trigeminal nerve; increased calcitonin gene-related peptide (CGRP); and circadian rhythm dysregulation.
They are more common in men than women, in those aged 20 to 50, and people who smoke are at greater risk of developing chronic cluster headaches. There is also some evidence to suggest that they run in families.
Other common triggers include alcohol, food that contains nitrates (such as garlic and meat), strong odours (such as perfume and paint), certain medications (nitroglycerin), and weather changes.
How are Cluster Headaches treated?
Cluster headache is typically managed through a combination of manual therapy, medical management, and lifestyle modification. What we offer here at MHCG addresses the upper cervical component. Medical and pharmacological options sit with your GP or neurologist, and we work alongside them. The options below reflect the full landscape of what patients may encounter across both manual and medical care:
- Watson Headache® Approach: This is a series of manual, non-manipulative cervical techniques that are designed to address disorders and misbehaviours in the upper neck.
- Oxygen Therapy: Although it’s unclear why this may help, some patients report a decrease in symptoms after breathing in pure oxygen via a mask for around 15 minutes.
- Supplements: Some cluster headache patients report benefit from anti-inflammatory supplement regimens. Research in this area is still developing, and some protocols involve doses that require medical supervision to use safely. If you are interested in this approach, speak with your GP before starting.
- Medications: Pharmacological management is an important part of cluster headache care for many patients and is best discussed with your GP or a neurologist. Acute options and preventive medications are available and your prescribing doctor will advise on what is appropriate for your presentation. Our treatment works alongside any medication regimen rather than as a replacement for it.
- Electrical Stimulation: For patients with chronic or refractory cluster headache, neurologists may discuss neuromodulation options including vagus nerve stimulation. Some patients are also referred for more specialised procedures. These are medical referral pathways rather than something initiated here, but worth raising with your neurologist if standard management has not provided adequate relief.
FAQ regarding cluster headaches
How are cluster headaches diagnosed?
There is no single diagnostic test for cluster headache. Diagnosis is made through a detailed clinical history of your attack pattern, timing, associated symptoms, and behaviour during attacks, combined with ruling out secondary causes. MRI or CT scans may be ordered to exclude structural causes. At your first appointment with us, we also conduct a physical assessment of the upper cervical spine to determine whether cervical dysfunction is a contributing factor, which is not typically part of a standard diagnostic workup.
Can cluster headaches be prevented?
Yes. Cluster-like headaches can occasionally be a secondary symptom of other conditions, including arterial dissection (a tear in the wall of an artery supplying the brain) or pituitary gland disease. These require different and urgent management. If your headaches change suddenly in character or severity, begin after a neck injury, or are accompanied by new symptoms such as vision changes, facial weakness, or difficulty speaking, seek urgent medical assessment the same day. These features are outside what manual therapy should be treating and require immediate medical review.
Can cluster headaches be a symptom of other issues?
If you’ve been managing attacks without a clear understanding of what’s driving them, a targeted upper cervical assessment may identify a component that hasn’t been addressed. We’ll tell you at your first appointment whether we think we can help, and if not, we’ll point you toward who can.