Quick Summary
- Tracking cluster headache attacks can reveal patterns in timing, frequency, duration, severity and treatment response that are difficult to remember accurately.
- Research shows that cluster headache often has a strong daily rhythm, although the pattern varies substantially between individuals and can change over time.
- Record what actually happens rather than what you expect to happen. Your data may challenge assumptions you have made about your attacks.
- A useful record includes start and end times, pain intensity, which side is affected, accompanying symptoms, treatments used and what happened afterwards.
- Tracking does not diagnose cluster headache or tell you how to change treatment, but it can provide useful information for discussions with your doctor or headache specialist.
If you live with cluster headache, you may feel that you already know your attacks very well.
You know when one is beginning. You know the familiar pain. You may know which time of day feels particularly dangerous, what tends to happen during a bad period and whether the attacks seem to be becoming more frequent.
But memory and data are not always the same thing.
That was one of the discoveries made by Darshan Ramanagoudra, the cluster headache patient who created MyClusters.
During one cluster period, he was convinced that his worst attacks happened after lunch. When he eventually looked at the attacks he had actually recorded, the pattern was different.
His most painful period was between roughly 4 pm and 10 pm.
He also found something considerably stranger.
He had not recorded a single attack on a Wednesday.
There was no obvious explanation.
That does not mean Wednesday was somehow protecting him. It means the data showed something he had not noticed.
And that is the real value of tracking.
Cluster headache is unusually connected to time
Timing is particularly interesting in cluster headache because attacks often show strong daily rhythms.
A major systematic review and meta-analysis found evidence of a circadian pattern in 70.5% of nearly 5,000 people with cluster headache included across 16 studies.
Across the populations studied, attacks were particularly common between 9 pm and 3 am, with 2 am emerging as the single most frequent hour.
But that does not mean everyone with cluster headache has an attack at 2 am.
Far from it.
Individual patterns vary considerably. Some people experience strikingly regular night-time attacks. Others have daytime patterns. Some experience several attacks during a 24-hour period, and some do not show a clear daily rhythm at all.
More recent research also suggests that these rhythms may change between different cluster periods.
The useful question is therefore not:
“When do people with cluster headache normally get attacks?”
It is:
“When do your attacks actually happen?”
Read the systematic review on circadian patterns in cluster headache
Your data may tell a different story from your memory
The personal account published by MyClusters provides a particularly good example.
Darshan had lived with cluster headache for more than nine years. During a particularly difficult period in 2023 and 2024 he experienced multiple daily attacks, disrupted sleep and very high oxygen use.
When another cycle developed later in 2024, he began recording it systematically.
From 5 December to 12 January, he logged his attacks properly.
The resulting reports showed several things he had not expected.
His worst attacks were later in the day than he had assumed.
Attacks often followed recognisable patterns of timing and duration.
And, during the period he recorded, Wednesdays happened to remain attack-free.
Perhaps more significantly, his headache pattern itself had changed.
Historically, his attacks had predominantly affected the right side. During the period he was recording, severe left-sided attacks became much more prominent.
None of these observations on their own explain why something happened.
That distinction matters.
A tracker can tell you that two things occurred together. It cannot necessarily tell you that one caused the other.
Read Darshan’s full MyClusters tracking story
What should you record during a cluster headache attack?
You do not need to write an essay during every attack.
In fact, any tracking system that is too complicated to use when you are in severe pain is unlikely to last very long.
The most useful starting information is fairly simple:
- when the attack started
- when it ended
- pain intensity
- which side was affected
- where the pain was concentrated
- accompanying symptoms
- treatment used
- how quickly treatment was used
- whether the attack improved
- any possible trigger or unusual circumstance
Depending on what you and your healthcare professional are trying to understand, you might also record sleep, medication changes, alcohol consumption or other factors that appear relevant.
Mayo Clinic specifically recommends keeping a headache diary when preparing for a medical appointment, including information such as date, time, duration, intensity, possible triggers, medication and the degree of relief.
See Mayo Clinic’s guidance on keeping a headache diary
Track the treatment as well as the attack
Knowing that you had five attacks last week is useful.
Knowing what happened during those five attacks can be more useful.
For example:
Did you use prescribed oxygen?
How soon after the attack began did you start?
How long did you use it?
Did the pain stop?
Did it return later?
Did you use another prescribed acute treatment?
Has your overall attack frequency changed since starting or changing a preventive treatment?
These records do not tell you to change your treatment. That remains a conversation for your neurologist or headache specialist.
They can, however, make that conversation much more concrete.
“I don’t think it is working very well” gives a clinician relatively little information.
“I recorded 23 attacks in three weeks and this is what happened when I used my acute treatment” gives them something much more specific to discuss.
For people already prescribed high-flow oxygen, our guide to high-flow oxygen for cluster headaches and travel explains why the oxygen requirements involved can be quite different from ordinary long-term oxygen therapy.
Be careful when identifying triggers
Tracking often leads naturally to the subject of triggers.
That can be useful, but it can also lead to false conclusions.
Suppose you record an attack after a poor night’s sleep.
Then it happens again.
It is tempting to conclude that poor sleep caused the attack.
Perhaps it contributed. Perhaps the developing cluster cycle was itself disturbing your sleep. Perhaps the two things happened together for another reason.
The same caution applies to food, exercise, stress, routines and other factors.
In his MyClusters account, Darshan describes changing his sleeping pattern and daily routine and later seeing his attacks decline. He also received a greater occipital nerve injection during this period, and his cluster cycle was changing.
He therefore does not claim to know exactly what produced the improvement.
That is the appropriate way to interpret tracking data.
Look for repeated patterns.
Discuss them with your healthcare professional.
Do not assume that every association reveals a cause.
Patterns can change from one cluster period to another
Another reason to keep tracking is that yesterday’s pattern may not remain tomorrow’s pattern.
Research into the timing of cluster headache suggests that circadian rhythmicity is not necessarily fixed throughout someone’s lifetime.
People can gain a daily pattern, lose one or experience attacks at a different time in later cluster periods.
A recent scientific review notes that cluster headache timing can change over time and that prospective recording may give researchers more accurate information than asking people to remember their lifetime attack patterns retrospectively.
This makes intuitive sense.
If someone asks you what time most of your attacks occurred over the last five years, you are reconstructing thousands of experiences from memory.
A contemporaneous record is different.
Read the recent review of circadian rhythms and cluster headache
Tracking can also help if you are still seeking a diagnosis
A tracker cannot diagnose cluster headache.
That needs to be very clear.
But an accurate record can help a healthcare professional understand what you are experiencing.
Cluster headache diagnosis depends heavily on the pattern and characteristics of the attacks, including how long they last, how frequently they occur, where the pain is located and which other symptoms accompany them.
A record showing repeated severe one-sided attacks lasting less than three hours and occurring at similar times gives your doctor much more precise information than trying to remember everything during an appointment.
If you are experiencing new, severe or changing headaches, tracking should never replace medical assessment.
Why a cluster-specific tracker can be useful
A general headache diary can work perfectly well.
Paper works.
A spreadsheet works.
Notes on your phone can work.
The important thing is that you actually record the information consistently.
MyClusters takes a more specialised approach because it was designed specifically around cluster headache.
The platform allows users to log information such as attack timing, pain level, symptoms and possible triggers, and then visualise patterns in their data.
It also provides reports that can make trends easier to see over time.
See how MyClusters works for people with cluster headache
That visual element matters.
A list of 60 attacks is difficult to interpret.
A chart showing that most occurred during a particular six-hour window is much easier to understand.
Can tracking help when you are planning a holiday?
It can help with the practical information.
If you rely on prescribed high-flow oxygen for cluster headache, OxygenWorldwide will need to understand the oxygen requirement you already use.
We do not decide your treatment or tell you what flow rate to use.
Our job is to determine whether the oxygen you have been prescribed can be arranged at your destination and how the supply should be coordinated.
Tracking can sometimes help you explain your recent real-world usage more accurately.
For example, someone in an active cluster period may know from their records how frequently attacks have been occurring and how they have been using their prescribed oxygen.
That information can be useful when discussing practical cylinder consumption and refill requirements.
It does not guarantee that the same pattern will continue during the holiday.
So we plan conservatively and check the practical requirements before travel.
Our guide to travelling with high-flow oxygen explains why flow rate, type of equipment, duration of use and destination all affect what can realistically be arranged.
Your data can contribute to research too
Tracking has another potential value beyond managing your own records.
Real-world data can help researchers understand how cluster headache behaves outside a clinic.
MyClusters allows users to choose whether to share anonymised information for research. According to the platform, users retain control over that choice.
The project has already built a growing dataset of recorded attacks from people in multiple countries.
Learn more about MyClusters and its research-focused approach
This type of longitudinal information can potentially help researchers investigate questions that are difficult to answer during occasional hospital appointments.
How do attack patterns change?
How stable is timing?
How do cluster periods evolve?
What happens between appointments?
Good research still requires careful study design and clinical interpretation. A large collection of self-recorded attacks does not automatically answer those questions.
But it can provide researchers with something valuable: detailed information about what happens in everyday life.
The aim is not to become obsessed with every attack
There is also a practical limit to tracking.
The purpose is to make your condition easier to understand, not to make cluster headache occupy even more of your day.
If logging an attack becomes complicated, intrusive or stressful, simplify it.
Start with the essentials.
- Time.
- Duration.
- Intensity.
- Side.
- Treatment.
Then add other information only when it serves a useful purpose.
The best tracker is not the one that collects the most data.
It is the one you can realistically keep using.
Better information gives you something concrete to work with
Cluster headache can feel unpredictable.
Tracking does not make it predictable overnight, and it certainly does not remove the pain.
What it can do is replace some assumptions with evidence from your own experience.
- You may discover that attacks are more regular than you thought.
- You may discover that they are less regular.
- You may see changes in duration or intensity.
- You may find that a treatment appears to coincide with an improvement worth discussing with your neurologist.
Or you may discover something as apparently inexplicable as having no attacks on Wednesdays.
The point is not that every pattern needs an explanation.
It is that you can see the pattern in the first place.
If you already use prescribed high-flow oxygen for cluster headache and are planning a trip, those records can also help you describe your normal usage more accurately.
OxygenWorldwide can then check what suitable oxygen equipment and supply can be arranged at your destination, coordinate delivery with your accommodation and plan refills where they are available.
Fill in the OxygenWorldwide travel form with your destination, dates and existing oxygen requirements and we will guide you from there.
Key Takeaways
Cluster headache tracking is most useful when it records what actually happens rather than what you expect to happen. Timing, duration, frequency, intensity, side, symptoms and treatment response can reveal patterns that are difficult to reconstruct from memory.
Those patterns do not automatically explain why attacks occur, and tracking should never replace medical diagnosis or advice. Its value lies in providing clearer information for you and your healthcare team.
Keep the process simple enough to maintain. A small amount of consistently recorded information is usually more useful than an elaborate diary you abandon.
If prescribed high-flow oxygen is part of your treatment and you are planning a trip, your recent records may also help explain your normal usage. Fill in the OxygenWorldwide travel form and we will check what can be arranged at your destination.
Frequently Asked Questions
How long should I track my cluster headaches?
There is no fixed period that suits everybody. Recording throughout an active cluster period can be particularly useful because it allows you to see how frequency, timing, duration and severity change. For chronic cluster headache, longer-term tracking may reveal trends that are difficult to recognise over a few days. The important thing is to use a system you can maintain without making tracking itself burdensome.
Can a headache tracker diagnose cluster headache?
No. A tracker can record characteristics that may be useful to a doctor, including attack duration, timing, frequency and accompanying symptoms, but it cannot confirm a diagnosis. If you are experiencing severe, recurrent or changing headaches, seek medical assessment.
What are the most important things to record?
Start with the attack’s start and end time, pain intensity, which side is affected, relevant symptoms and treatment used. You can then add possible triggers, sleep information or other observations if they are useful. Consistent basic data is generally more valuable than an elaborate diary you stop using after a few days.
Can tracking identify my cluster headache triggers?
It can reveal associations worth investigating, but an association does not prove that something caused an attack. If a possible trigger repeatedly appears before attacks, discuss the pattern with your healthcare professional rather than automatically changing your treatment or lifestyle based on the tracker alone.
Can tracking help me calculate how much oxygen I need for a holiday?
Your records may help describe how frequently you have recently been using your prescribed oxygen, which can be useful for practical planning. They should not be used to change your prescribed flow rate or treatment. OxygenWorldwide uses your existing oxygen requirements and travel details to check what supply can be arranged at the destination.
Do I have to share my MyClusters data with researchers?
MyClusters states that users control whether they share their data for research and that research data is anonymised. You can use the tracking functionality while retaining control over your data-sharing choices.
Summary
Cluster headache tracking can reveal patterns in attack timing, frequency, duration, severity, side and treatment response that may be difficult to recognise from memory alone. Research shows a strong circadian component in cluster headache for many patients, although individual patterns vary and can change over time. Useful records include attack start and end times, pain intensity, accompanying symptoms and treatments used. Tracking cannot diagnose cluster headache or establish that a suspected trigger caused an attack, but it can provide clearer information for discussions with healthcare professionals. MyClusters provides a cluster-specific way to record and analyse these patterns.
