Why do I get a headache after crying?

Short answer

Crying hard means several minutes of tensed facial, jaw and neck muscles, irregular breathing, a congested nose and a surge of stress hormones — followed by a sharp drop when it stops. In one study of 163 people with recurrent headaches, 55% named crying as a trigger for their attacks. And the drop matters as much as the episode: a fall in stress levels is a documented migraine trigger, which is why the headache often arrives once you have calmed down rather than while you are upset.

If headaches keep following emotional days, it is worth checking whether they are migraine attacks rather than "just stress": take the 2-minute survey.

Note: this article explains what is known about headaches after crying and is not medical advice. Headaches that follow emotional days are often undiagnosed migraine attacks, which is worth knowing because migraine has treatments that tension-type headache does not.

This is not you being dramatic

There is a particular embarrassment attached to this symptom. You had a hard evening, you cried, and now your head hurts — and the headache feels like evidence that you overreacted. People rarely mention it to a doctor for exactly that reason, which is a shame, because it is one of the more clearly documented triggers there is.

In a prospective study at a university clinic, 163 people with recurrent migraine or tension-type headache were asked what set their attacks off. Ninety of them — 55.2% — considered crying a potential trigger: 62 with migraine, 28 with tension-type headache. Only stress, anxiety and menstruation ranked as high or higher. That is self-reported perception rather than a controlled provocation, and the sample is small, but it makes one thing clear: you are not the only person who has noticed this, and it is common enough to have been studied.

You were not imagining it, and it is not your fault. Nothing about a crying headache requires you to have been "too emotional". It is the same mechanism that gives people a headache after a tense meeting with their jaw clenched, or after a bad night. Crying just does several of those things at once, in a compressed period.

What actually happens while you cry

Muscles. Crying tightens the muscles around the eyes, jaw, temples, scalp and back of the neck, and holds them there. Increased tenderness in exactly those muscles is, in the words of the international headache classification, the most significant abnormal finding in tension-type headache — present between attacks, worse during them, and increasing with headache intensity and frequency. Sustained tension in that muscle group produces the pressing, band-like ache on both sides that most people recognise.

Breathing. Sobbing is irregular breathing: short gasps, held breath, a long shuddering exhale. Breathing like that lowers arterial carbon dioxide, which causes respiratory alkalosis and constriction of blood vessels in the brain, reducing blood flow. The documented consequences include lightheadedness, tingling and, in extreme cases, fainting. Pain and anxiety are both listed as frequent causes of exactly this breathing pattern.

The nose and sinuses. Tears drain from the eye through the tear ducts into the lacrimal sac and down the nasolacrimal duct, which opens into the nose beneath the lower turbinate. That is why heavy crying gives you a blocked, running nose, and why people describe a heavy pressure behind the eyes and across the forehead afterwards. Being honest about the limits of the evidence here: the drainage anatomy is well established, but we could find no study testing whether that congestion actually causes headache. Treat it as a plausible contributor, not a proven one. That is also true of crying generally — one of the papers on the subject opens by noting that the physiology of crying is not well documented or understood.

Stress hormones, and then the drop. Intense emotion activates two systems at once: the sympathetic-adrenomedullary axis, releasing adrenaline and noradrenaline, and the hypothalamic-pituitary-adrenal axis, releasing cortisol. Cortisol then exerts negative feedback that shuts the response down, so levels fall once the episode passes.

That fall is the interesting part.

The "let-down" pattern: why it hits after you calm down

If your headache reliably arrives once the crying has stopped and you are wrung out but calm, there is a name and a study for that.

In a three-month electronic diary study, researchers tracked perceived stress and migraine onset. What predicted an attack was not how stressed people were — it was the decline. A drop in perceived stress from one evening to the next was associated with migraine onset over the following 6, 12 and 18 hours, with odds ratios between 1.5 and 1.9. The absolute level of stress was not generally associated with attacks.

It is a small study — 17 people completed it, at a specialist headache centre — so hold the numbers loosely. But it matches the pattern people describe constantly: the migraine on the first day of a holiday, the headache on Friday evening rather than during the difficult week, and the one that starts an hour after you stop crying.

One note of caution if you read further on this: some patient-facing pages state the risk in the first six hours is "almost five times higher". That figure does not match the published odds ratios of 1.5 to 1.9, and we are not repeating it.

Tension headache or migraine? The difference changes what you can do

These two get treated identically by most people, and should not be.

Those are close to the formal diagnostic criteria. Migraine without aura requires at least five attacks lasting 4–72 hours, with at least two of the four pain features and at least one of: nausea or vomiting, or light and sound sensitivity together. Tension-type headache requires at least two of its own four features, plus no nausea and no more than one of light or sound sensitivity.

Why it matters: migraine has treatments that tension-type headache does not — medication taken at the first sign of an attack, and preventive treatment when attacks are frequent. If your crying headaches are actually migraine attacks, "try to relax" is nowhere near the ceiling of what is available to you.

And this is not a rare mix-up. In a US population survey, only 48% of people who met the diagnostic criteria for migraine reported ever having been given that diagnosis by a doctor. A larger survey a few years later put the figure at 56%. Both are US-only and two decades old, but the direction is consistent: roughly half of migraine goes unnamed, and "headaches after stressful days" is one of the most common places it hides.

Why this may be more than a bad evening

If both the crying and the headaches are frequent, they may share a cause rather than one causing the other — and that relationship runs in both directions.

In a Norwegian population study with eleven years of follow-up, people with anxiety or depression at the start had roughly double the risk of migraine at follow-up, and a 40% increased risk of tension-type headache. Going the other way, having tension-type headache or migraine at baseline predicted higher anxiety and depression scores later. Migraine with aura carried an 81% increased risk of anxiety.

This is not a reason to feel worse about it. It is a reason to bring both to the same appointment, because treating one and ignoring the other tends to work badly.

Why crying sets it off some days and not others

This inconsistency is the main reason people dismiss the pattern in themselves — if crying really caused it, surely it would cause it every time.

Triggers in migraine do not work as switches. They stack. A difficult evening on top of six hours of sleep, a skipped dinner and a week of sustained stress is a very different physiological situation from the same evening after a normal week. In the largest trigger survey, three-quarters of people reported triggers at all, and the leading ones — stress at 79.7%, hormonal changes at 65.1%, not eating at 57.3%, sleep disturbance at 49.8% — are exactly the ones that tend to coincide.

There is a second reason, and it cuts the other way. Some things people identify as triggers turn out to be early symptoms of an attack that had already begun. A 2021 study found that several commonly reported triggers, including light, sound and skipping meals, may actually be early manifestations of the phase that precedes the pain. If a hard evening happens because you were already irritable, tired and on edge, the attack may have started before the crying did.

Neither of these means you are wrong about the pattern. They mean the honest unit of measurement is a diary over weeks, not a single memorable evening.

What your own data can show

Emotional episodes leave a clearer physiological trace than almost anything else you can measure at home.

What to look at. Heart rate climbing well above your usual resting range during and after the episode. Heart rate variability dropping below your own baseline that evening, and often staying low the next morning. A poor night's sleep afterwards, which then becomes its own trigger for the following day. If your headache days repeatedly line up with those nights, you have a pattern rather than an anecdote.

Welltory measures heart rate, heart rate variability and sleep from your phone or wearable, which is what makes a difficult evening visible as data rather than as a memory.

What it cannot do. No device tells you whether a headache is migraine or tension-type — that is a clinical judgement based on the features in the table above. A single low reading is not a diagnosis of anything, and comparing your numbers to someone else's tells you very little. The unit of meaning is your own baseline, over weeks.

What it does well is establish that the day was physiologically hard. When the whole problem is that the symptom feels invented, that is not a small thing.

What actually helps in the hour afterwards

Ordered honestly by how much difference each makes, and flagged where the evidence is thin.

1. Unclench, specifically. Jaw loose, teeth apart, tongue off the roof of your mouth, shoulders down. These stay tight long after you notice, and pericranial muscle tension is the best-documented mechanism on this list.

2. Slow breathing for two minutes, longer out than in. This is the fastest way to undo the low-carbon-dioxide state that sobbing produces.

3. Water, deliberately. Two glasses rather than sips. Worth saying that the evidence for hydration in headache is weaker than popular coverage implies — the one randomised trial of increased water intake found improved quality of life but no reduction in headache days, frequency or duration. It costs nothing, but do not expect it to be the answer.

4. Cold on the forehead or neck. A systematic review of six studies found cold reduced migraine pain at 30 minutes, but with a very wide confidence interval, no significant effect at 24 hours, and certainty of evidence rated very low to moderate. In practice: it may take the edge off for half an hour. That is worth having, and it is not a treatment.

5. Eat something if the evening replaced dinner. Not eating is among the most commonly reported triggers, and a skipped meal will carry the problem into tomorrow.

6. Dark and quiet if light or sound bother you. That preference is itself diagnostic information — note it.

7. Medication early, not at the peak. If these are migraine attacks, the American Headache Society's guidance is explicit: treat at the first sign of pain to improve the chance of becoming pain-free and reduce disability. In one trial, treating while pain was still mild gave a substantially higher pain-free rate at two hours than treating once it was moderate or severe.

What does not help: waiting it out to prove you are fine, and a third coffee.

Is it actually migraine?

Roughly half of migraine has never been diagnosed, and headaches that follow emotional days are a classic place for it to sit unnamed. The survey takes two minutes and asks the questions a clinician would start with: start the survey.

When this needs a doctor's attention

• A headache that reaches maximum intensity within seconds — emergency care.

• A headache with weakness, numbness, confusion, trouble speaking or vision changes.

• Fever, or a headache in someone with a history of cancer or a condition affecting the immune system.

• A first headache starting after age 65, or a clear change in a pattern you have had for years.

• Headaches on more than about eight days a month, whatever sets them off.

• Painkillers on more than two days a week — that alone can create a headache of its own.

• Frequent crying alongside low mood, loss of interest, or thoughts of harming yourself. That belongs in the conversation, and it is a reason to speak to someone, not a reason to feel embarrassed.

How to bring this up with your doctor

The hardest part is saying it out loud, because it sounds trivial. Two things make it easier.

Lead with frequency, not with the crying. "I get headaches about eight days a month. Most of them follow an emotionally intense day." The first sentence determines what treatment you are offered. The second is context.

Bring the log. Four to eight weeks, with: the date, how long the headache lasted, one side or both, throbbing or pressing, whether movement made it worse, whether light and sound bothered you, whether you were nauseous, and what the day before looked like. That table is precisely what separates tension-type headache from migraine, and it is the same table that decides whether preventive treatment is on the table.

What to ask for.

• Whether these meet the criteria for migraine. Ask in those words — it changes the answer from reassurance to a diagnosis.

• What to take at the first sign of an attack rather than at its peak.

• Whether preventive treatment applies. The American Headache Society's thresholds are tiered by disability: prevention should be offered at six or more headache days a month with no disability, four or more with some disability, three or more with severe disability, and considered at lower counts.

• Whether anything you already take could be adding to the problem.

If your mood is part of this, say so in the same appointment. The population evidence shows the two travel together in both directions, and separating them across two appointments six months apart helps nobody.

If you are brushed off. "Can you note in my record that migraine was considered and ruled out, and why?" It is a fair request, and it usually slows the conversation down enough to be useful.

How we made it

Written from the International Classification of Headache Disorders (3rd edition) for all diagnostic criteria, plus peer-reviewed studies on crying as a headache trigger, the stress let-down hypothesis, the bidirectional link between headache and mood, and cold therapy. Where the evidence is thin — crying-related congestion causing headache, hydration, cold packs — we say so in the text rather than overstating it.

Written by the Welltory science team Data analysis by the Welltory data team Reviewed by Anna Elitzur, MD

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