Cluster Headache: Causes, Symptoms, and Treatment
Medically reviewed by Sumiran Racherla, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Cluster Headache?
A neurologist, a doctor who treats problems of the brain and nerves, usually treats cluster headache. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is cluster headache?
A cluster headache is an uncommon type of headache. It is one-sided head pain that may involve tearing of the eyes, a droopy eyelid, and a stuffy nose. Attacks last from 15 minutes to 3 hours. They happen daily or almost daily for weeks or months. The attacks are separated by pain-free periods that last at least 1 month.
A series of attacks is called a cluster period. A small group of people have a chronic form, which means the attacks can go on for a year or more without stopping. Their cluster periods can go on for years with only short times without pain.
Cluster headaches may be confused with migraines, sinus headaches, and tension headaches. Cluster attacks usually happen less often and are shorter than migraine attacks.
Symptoms
A cluster headache begins as a severe, sudden headache. It commonly strikes 2 to 3 hours after you fall asleep, but it can also happen when you are awake. It is felt on one side of the face, often involving the eye. The pain is at its worst within 5 to 10 minutes, and the strongest pain lasts 30 minutes to 2 hours.
The eye and nose on the same side as the head pain may also be affected.
- Swelling under or around the eye.
- Excessive tearing.
- A red eye.
- A droopy eyelid.
- A runny or stuffy nose on the same side as the head pain.
- A red, flushed face, with extreme sweating.
Attacks often wake people from sleep.
Causes and who gets it
Health care professionals do not know exactly what causes cluster headaches. They seem to be related to a sudden release of histamine, a chemical released during an allergic response, or serotonin, a chemical made by nerve cells. This happens near a nerve in the face called the trigeminal nerve. A problem in a small area at the base of the brain called the hypothalamus may be involved. More men than women are affected. Cluster headache generally begins between ages 20 and 40 but may start at any age. The headaches tend to run in families.
Alcohol and smoking can trigger cluster headache attacks. High altitudes, such as trekking and air travel, can also be triggers.
How doctors diagnose it
A provider can diagnose this type of headache with a physical exam and questions about your symptoms and medical history. Tests, such as an MRI of the head, may be needed to check for other causes. A headache diary can help you find your triggers.
Treatment
Some medicines treat the pain when it happens. Other medicines help prevent the headaches. Your provider may suggest triptan medicines, such as sumatriptan. Breathing in 100% (pure) oxygen is another treatment. Injections of dihydroergotamine (DHE) can stop cluster attacks within 5 minutes. This medicine can be dangerous if taken with sumatriptan or some other medicines. Pain medicines and narcotics do not usually relieve cluster headache pain because they take too long to work.
Most doctors will recommend verapamil as the first choice for preventing cluster periods. Avoid smoking, alcohol use, certain foods, and other things that trigger your headaches.
When to see a doctor
Call 911 or the local emergency number if:
- You have the worst headache of your life.
- You have speech, vision, or movement problems or loss of balance, especially if you have not had these symptoms with a headache before.
- The headache occurs with repeated vomiting.
- You have a high fever or stiff neck with your headache.
Schedule an appointment or contact your provider if your headache pattern or pain changes. Also do so if treatments that once worked no longer help. You should also contact your provider if you are pregnant or could become pregnant, because some medicines should not be taken during pregnancy.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either kind of doctor can review your symptoms and medical history, which is how this headache is diagnosed. They can also review your headache diary with you to look for triggers or a pattern.
Common questions
Is cluster headache life threatening?
No, cluster headaches are not life threatening. They usually do not cause permanent changes to the brain. But they are long-term and often painful enough to interfere with work and life.
Is a cluster headache the same as a migraine?
No, cluster attacks usually happen less often and are shorter than migraine attacks. Still, cluster headaches may be confused with migraines. Cluster headache pain is usually felt on one side of the face, often involving the eye.
What triggers cluster headaches?
Alcohol and smoking can trigger cluster headache attacks. Heat, such as hot weather or hot baths, is another trigger. A headache diary can help you find your own triggers.
Do regular pain pills help cluster headaches?
No, pain medicines and narcotics do not usually relieve cluster headache pain. Your provider may suggest other treatments, such as breathing in pure oxygen.
Sources
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
