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🤕 Why do we get headaches?

Trace head pain from sensitive structures through shared pathways, then distinguish migraine, tension-type, cluster, and secondary headache logic.

3
lessons
~10 min
to learn
🔬 Science
subject
Adults
level
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What you’ll learn

  1. The Pain Comes From Head StructuresTrace head pain from pain-sensitive cranial and neck structures through shared neural relays.Meninges, vessels, scalp, face, and neck can initiate nociceptive traffic; ordinary brain tissue is not the peripheral pain source. Trigeminal and cervical inputs converge, and sensitization can amplify the perceived output. Primary and secondary headaches name different causal roles.
  2. Different Disorders Recruit Different NetworksDistinguish migraine, tension-type headache, and cluster headache by network organization rather than simplistic labels.Migraine recruits trigeminovascular and distributed brain systems, sometimes with cortical aura. Tension-type headache combines pericranial input and sensitization. Cluster headache links trigeminal pain, cranial autonomic output, and hypothalamic timing.
  3. Patterns Matter More Than One SensationExplain why timing and accompanying features are more informative than location, intensity, or a single suspected trigger.Triggers alter probability in susceptible systems and require repeated evidence. Shared pathways create overlapping locations and qualities. Headache is a family of outputs whose classification depends on the pattern surrounding pain.

Questions this course answers

Put the general head-pain pathway in order.

Headache is constructed from activity in pain-sensitive structures and shared neural relays; ordinary brain tissue is not itself the peripheral pain receptor.

Match each primary headache disorder to its most characteristic organizing mechanism.

The disorders share pain pathways but recruit them in different patterns. None is defined by one isolated tissue or sensation.

Why can headache location alone not identify the disorder or cause?

Convergence and sensitization make similar locations possible across disorders. Classification requires timing, accompanying features, and causal context.

Grounded in trusted sources

  • Headache Classification Committee of the International Headache Society, The International Classification of Headache Disorders, 3rd edition — https://pubmed.ncbi.nlm.nih.gov/29368949/
  • Levy and Moskowitz, Meningeal Mechanisms and the Migraine Connection — https://pmc.ncbi.nlm.nih.gov/articles/PMC11412714/
  • Burstein et al., Migraine and the trigeminovascular system: 40 years and counting — https://pmc.ncbi.nlm.nih.gov/articles/PMC7164539/
  • Bendtsen, Central and peripheral sensitization in tension-type headache — https://pubmed.ncbi.nlm.nih.gov/14604505/
  • San-Juan et al., Cluster headache: an update on clinical features, epidemiology, pathophysiology, diagnosis, and treatment — https://pmc.ncbi.nlm.nih.gov/articles/PMC10957682/
  • Close et al., Cortical spreading depression as a site of origin for migraine: Role of CGRP — https://pmc.ncbi.nlm.nih.gov/articles/PMC7007998/

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