Headache After Exercise, Coughing and Sex: Causes and When to Get Tested

The ICHD-3 classification distinguishes three related primary diagnoses. Primary cough headache appears only in connection with coughing, straining or other Valsalva manoeuvres, begins suddenly and lasts from a second to about 2 hours. Primary exercise headache occurs during or after strenuous physical exercise and lasts less than 48 hours; it is often pulsating. Primary headache associated with sexual activity begins during the activity, builds with excitement or appears suddenly at orgasm, and lasts from a minute to about a day (or up to 72 hours in the mild form).

During coughing, straining, lifting or orgasm, pressure in the chest and abdomen rises abruptly, which transiently raises pressure in the veins and alters the pressure of the cerebrospinal fluid. In healthy people the vascular system of the brain compensates for these fluctuations. In primary headache the mechanism is not fully understood — sensitivity of the venous vessels and meninges to rapid pressure changes is suspected, as well as hyperreactivity of the arteries. These are mechanistic hypotheses, not established facts.

The response to indomethacin also matters: it is a non-steroidal anti-inflammatory drug which — unlike ordinary ibuprofen — acts strongly in the group of so-called indomethacin-responsive headaches (cough, exertional, sex-related, paroxysmal hemicrania). The exact reason for this exceptional sensitivity is unknown; it is thought that the drug lowers cerebral blood flow and intracranial pressure, but this is a theory. For the patient the practical conclusion is that the effectiveness of indomethacin supports the diagnosis of a primary form, but its absence or an incomplete response does not settle the diagnosis — it is one clue, not a test.

The second layer is structural and vascular causes, in which the Valsalva manoeuvre acts as a 'trigger'. A type I Chiari malformation consists of the cerebellar tonsils descending below the foramen magnum, which obstructs the flow of cerebrospinal fluid; coughing abruptly raises the pressure and provokes occipital pain. Posterior fossa tumours, cysts or hydrocephalus can act similarly. Sudden, thunderclap pains with exertion or sex may also result from a ruptured aneurysm (subarachnoid haemorrhage), dissection of a carotid or vertebral artery or reversible cerebral vasoconstriction syndrome (RCVS).

Cough headache is particularly insidious because both forms — primary and secondary — look similar to the patient: a short, sharp, 'bursting' pain after coughing, sneezing, laughing or bending. The differences are noticed only by careful questioning and examination.

This review is narrative (clinical description and expert opinion) and not a meta-analysis of randomised trials, so we rate the level of evidence as moderate. The practical conclusion, however, is consistent with the literature: pain with coughing is a reason for an MRI, not for long-term self-treatment with painkillers. We write about the examination itself in the entry on magnetic resonance imaging.

Primary exertional headache is a pain appearing during or after strenuous exertion — running, strength training, swimming, but also lifting or climbing. As a literature review in Current Pain and Headache Reports summarises, it is an uncommon, self-limiting and short-lasting disorder, often coexisting with migraine, considered benign, and responsive to avoidance of the trigger and to indomethacin.

Factors that clinical observation suggests favour exertional headaches are heat, high altitude, dehydration, undereating before training and exertion without a warm-up. For none of them, however, are there strong controlled studies; we treat them as reasonable pointers. A headache appearing only during sudden, maximal exertion (for example heavy deadlifts with breath-holding) is sometimes linked to the Valsalva manoeuvre — adjusting breathing technique and grading the loads may help, though it does not replace investigation.

Primary headache associated with sexual activity is a well-defined, benign disorder, but its first episode can be frightening because the pain may be sudden and very severe at orgasm. A 2025 meta-analysis estimated its frequency among adults presenting with headache to specialist centres.

Two things need separate explanation. First, this meta-analysis concerns the frequency of the benign diagnosis among patients seeking help — it does not say how often a headache during sex turns out to be dangerous; the data do not answer that question. Second, a sudden thunderclap pain linked to orgasm may be a symptom of subarachnoid haemorrhage or of reversible cerebral vasoconstriction syndrome (RCVS), a disorder in which the arteries of the brain narrow temporarily. A first episode should therefore never be brushed aside: it needs assessment and, when in doubt, imaging of the vessels.

Thunderclap headache is a pain of sudden onset reaching maximum intensity within a minute. It may occur spontaneously or in connection with exertion, coughing or sex. In the ICHD-3 classification primary thunderclap headache is a diagnosis of exclusion, so the dangerous causes must be checked first: subarachnoid haemorrhage from a ruptured aneurysm, dissection of the carotid or vertebral arteries, cerebral venous thrombosis, stroke, pituitary apoplexy and RCVS.

The Ottawa SAH rule mentioned takes into account, among other things, age of at least 40, neck pain or stiffness, witnessed loss of consciousness, onset of pain during exertion, thunderclap headache and limited neck flexion. This shows that 'onset during exertion' is one of the recognised alarm signals. A 99% sensitivity means that in a person with none of these criteria haemorrhage is very unlikely; low specificity means that most people with a positive rule do not have haemorrhage but still need to be examined. It is a tool for doctors in the emergency department, not for self-assessment at home.

The choice of tests depends on the picture of the pain. For thunderclap pain or suspected haemorrhage the first step is a CT scan of the head (as soon as possible after the pain begins), and if it is negative but suspicion remains high, further investigation at the doctor's discretion (for example examination of the cerebrospinal fluid or angiography). For cough headaches an MRI of the brain and craniocervical junction is recommended (to exclude a Chiari malformation and posterior fossa lesions). If narrowing of the vessels or dissection is suspected, MR angiography or CT angiography is added.

If all tests are normal and the picture fits a primary form, the diagnosis has a good prognosis. Most often the problem resolves on its own within months to a few years, though in some people it recurs. It should not be assumed in advance, however, that after one normal test it will 'never' be necessary to return to investigation: a change in the character of the pain, new symptoms or pain different from before is a reason for reassessment.

An effective option in both classic primary forms is indomethacin, used under a doctor's supervision (a non-steroidal anti-inflammatory drug that burdens the stomach, kidneys and circulation). The available data are mainly case series and expert opinion rather than large randomised trials, so the strength of evidence is moderate or low. The literature has also described the effectiveness of some other drugs (for example propranolol), but there are no strong comparative data; the decision belongs to the doctor.

Headache provoked by exertion, coughing or sex is one of the few headaches in which the commonest explanation is benign while the most dangerous is rare but not to be missed. The rule is therefore simple: a first episode is assessed by a doctor, and cough with pain at the back of the head is a reason for an MRI. When investigation excludes secondary causes the prognosis is usually good, and treatment — indomethacin and sensible adjustment of exertion — is effective in many people. Without investigation it is easy either to fear needlessly or to dismiss dangerously.