1. History

1.1 The priority question: who described it first?

Historians of headache medicine do not agree on who first documented cluster headache (CH), and several credible claims compete for priority. This disagreement is itself part of the story: Pearce (2007) calls one commonly repeated “first description” claim (Isler’s 1993 attribution to Gerard van Swieten) “gratuitous,” pointing out that Nicolaes Tulp (1641) and Thomas Willis (1672) “have attracted claims for priority” of their own historical (Pearce, PMC2117620).

The candidate earliest accounts, roughly in chronological order:

• Nicolaes Tulp, 1641 — the case of Isaak van Halmaal, often cited as the earliest plausible description historical (PMID 8242723).
• Thomas Willis, De Anima Brutorum, 1672 historical.
• Abraham de la Pryme, c. 1702 — an English diarist’s account, analysed retrospectively in Cephalalgia 2010 [PEER-REVIEWED analysis of a HISTORICAL/CULTURAL source] (doi: 10.1177/0333102410370871).
• Francisco Suárez de Ribera, 1726, Spain historical (PMID 21768182).
• Gerard van Swieten, 1745 — the account most often popularised as “the first,” per Isler 1993 historical (PMID 8358775).
• Other 18th-century German cases: Oppermann (1747, Regensburg, described as “hemicrania horologica” — “clockwork hemicrania,” a strikingly apt name for the circadian pattern discussed in Section 3), Morgagni (1761, Padua), and Whytt (1764, Edinburgh) — documented via the German historical wiki ck-wissen.de and cross-checked against Pohl (2022) historical (Pohl, Cephalalgia Reports 2022, snippet access only — full text blocked by publisher).

Non-Western and folk accounts (labelled historical throughout): The most substantive pre-modern non-Western parallel is the Ayurvedic concept of Suryavarta, attributed to the surgeon Sushruta — a circadian, periorbital headache described as tracking the sun’s movement. This is plausible as an early CH-like description but not confirmed as CH specifically. The Persian/Arabic term shaqiqa (“shaqhiqheh”) is generally understood as a migraine analogue rather than a CH-specific term. No confirmed pre-modern Traditional Chinese Medicine description of CH exists; TCM engagement with the condition appears to be a modern clinical adaptation rather than an ancient one.

1.2 The 19th century: fragments before synthesis

Through the 1800s, CH was described piecemeal, under many different names, without being recognised as a single distinct entity:

• Müller, 1813, Frankfurt — regarded as the first German-language report historical.
• Marshall Hall, 1836 — “hemicrania intermittens” / “brow ague” historical.
• Romberg, 1840 — “ciliary neuralgia”; a 1992 commentary by Pearce suggests this description “may merit priority” for capturing the syndrome accurately [HISTORICAL/CULTURAL, with a PEER-REVIEWED retrospective assessment].
• Möllendorff, 1867 — “Red migraine”; historians note this description does not fully meet modern CH criteria historical.
• Eulenburg, 1871–1883 — “Hemicrania angioparalytica” and related terms; scholars disagree on whether this represents true CH or migraine historical.
• Francis Kilvert’s diary, 1870s — a speculative retrospective diagnosis based on a English clergyman’s diary entries, analysed by Larner historical.
• Sluder, 1908, and Vail, 1932 — “sphenopalatine ganglion neuralgia” / “Vidian neuralgia,” an anatomically-focused theory that would echo (and be refuted, see §3.6) almost a century later historical.
• Bing, 1913 — “erythroprosopalgia.” Pohl (2022) notes the original description lacked strict unilaterality (only added in a 1945 revision) and lacked lacrimation, miosis, and nocturnal predominance — i.e., it was not yet a full match to the modern syndrome historical.

1.3 Wilfred Harris and the 1926 turning point

Wilfred Harris’s 1926 monograph, Neuritis and Neuralgia, is regarded by several headache historians (Rooke, Rushton, Peters, as summarised by Pearce 2023) as the first genuine recognition of CH as an entity separate from both migraine and trigeminal neuralgia historical. This matters because it complicates the popular story that follows: historians argue that Bacchus Traver Horton’s 1939 “new syndrome” substantially duplicated Harris’s earlier, more complete account, even though Horton’s name became far more strongly attached to the condition in the decades that followed.

1.4 Horton, histamine, and the “suicide headache”

• Horton BT, MacLean AR, Craig WM. “A new syndrome of vascular headache: results of treatment with histamine.” Proc Staff Meet Mayo Clin. 1939;14:257–260. peer-reviewed — the primary source located for the description that made Horton’s name synonymous with CH for much of the mid-20th century.
• Horton later termed it “histaminic cephalgia” (J Lancet 1952;72:92–98) peer-reviewed, reflecting his belief — later abandoned as a general explanation — that histamine release was central to the attack (see §3.6 for the fate of vascular/histamine theories).
• The nickname “suicide headache” has a genuinely contested origin. One line of sourcing (JAMA) ties it to Horton’s 1939 description; a separate Italian source (leadershipmedica.it) claims it was coined by unnamed French authors. Neither claim is confirmed by primary-source verification in this research pass — this is flagged as a genuinely unresolved point of etymology, not a settled fact historical.

Ekbom’s dissent. Kaare Ekbom (1947, Acta Psychiatr Neurol Suppl 46:105–113) peer-reviewed proposed the term “Harris-Horton Disease,” but importantly disputed the histamine-causation theory even at this early stage, treating patients with oral ergotamine instead. Ekbom would go on to suggest the episodic/chronic distinction as early as 1971 — a distinction not formally adopted into classification until 2004 (see §1.6).

1.5 Naming evolution: a syndrome hunting for its name

The official IHS historical table (reproduced here from the sources) traces an unusually long chain of names for the same underlying condition, reflecting decades of competing anatomical and physiological theories about where the problem lived before consensus was reached:

Year	Name	Proposed by
1867	Red migraine	Möllendorff
1883	Angioparalytic hemicrania	Eulenburg
1910	Sphenopalatine ganglion neuralgia	Sluder
1913	Erythroprosopalgia	Bing
1925	Syndrome de vasodilatation…	Vallery-Radot / Blamoutier
1926	Ciliary neuralgia	Harris
1931	Syndrome du nerf nasal	Charlin
1932	Vidian neuralgia	Vail
1935	Autonomic faciocephalalgia	Brickner / Riley
1936	Migrainous neuralgia	Harris
1939	Erythromelalgia of the head	Horton et al.
1947	Greater superficial petrosal neuralgia	Gardner et al.
1952	Histaminic cephalgia	Horton
1952	Cluster headache	Kunkle et al.

[HISTORICAL/CULTURAL, tabulated from PEER-REVIEWED primary sources]. A parallel German tradition used “Bing-Horton headache syndrome” (Kaemmerer, 1961), a term still preserved today in ICD-10 code G44.0 historical.

Kunkle EC, Pfeiffer JB Jr, Wilhoit WM, Hamrick LW Jr. “Recurrent brief headache in cluster pattern.” Trans Am Neurol Assoc. 1952;56(77th Meeting):240–243. peer-reviewed — this is the paper that coined the name that stuck. It is a small irony of history that Kunkle himself regarded the condition as a migraine variant at the time, not an independent disease entity — the name outlived its author’s own nosological view.

1.6 From migraine subtype to independent diagnosis: the classification story

• Before 1988, CH was classified as a subtype of migraine (per the 1962 Ad Hoc Committee classification) historical.
• ICHD-1 (1988) made CH an independent diagnostic entity for the first time, introducing the episodic/chronic subtype split within a shared chapter titled “Cluster headache and chronic paroxysmal hemicrania” peer-reviewed.
• ICHD-2 (2004) introduced the umbrella category Trigeminal Autonomic Cephalalgias (TACs), grouping CH with paroxysmal hemicrania (PH) and SUNCT, and added restlessness/agitation as a diagnostic criterion for the first time peer-reviewed.
• ICHD-3 (2013 beta, finalised 2018) tested whether facial flushing and ear fullness should be added as new criterion features. Field testing (Moon et al. 2019) found these features “did not add to diagnostic discrimination,” so they were relegated to an appendix rather than the main criteria — a useful reminder that even very recent, formal diagnostic criteria are actively tested and revised, not handed down complete peer-reviewed. ICHD-3 also finalised the chronic-CH definition around a remission threshold of less than 3 months (see §2.1 for the full current criteria).

1.7 Sjaastad, the “Cluster Club,” and the birth of oxygen therapy

Ottar Sjaastad (Norway) described chronic paroxysmal hemicrania (CPH) in 1974/1976 — a crucial development because CPH’s defining feature, an absolute response to indomethacin, became (and remains, with caveats — see §2.4) the main tool for telling CPH apart from CH peer-reviewed. Sjaastad founded the “Cluster Club” (formally the International CH Research Group), which held its first meeting in Uppsala in 1979. Sjaastad was president and Lee Kudrow secretary; members included Ekbom, Horton, and Kunkle among others — effectively the founding generation of CH research meeting as one small, informal body historical.

Lee Kudrow went on to run the landmark controlled trial establishing oxygen as an effective abortive treatment:

Kudrow L. “Response of cluster headache attacks to oxygen inhalation.” Headache. 1981;21:1–4. peer-reviewed — 52 patients; 75% got relief with a 7 L/min oxygen mask; 62% aborted their attack within 7 minutes.

The trial’s origin is itself a small, human story worth preserving: an ophthalmologist and CH patient, Jerold Janks, wrote a 1978 letter to JAMA describing his own use of oxygen, which prompted Kudrow’s formal trial historical. Non-CH-specific oxygen use for headache had actually been noted decades earlier (Rhein & Alvarez, Mayo Clinic, 1939–40), but it took until 1981 for CH-specific evidence to exist, and German-language medicine did not widely adopt oxygen therapy until 1986 (Heckl) — a reminder that even well-evidenced treatments diffuse unevenly and slowly across countries [PEER-REVIEWED / HISTORICAL].

A 2024 bibliometric study (PMC11079126) identifies Peter Goadsby as the most prolific individual CH researcher in the literature (38 articles, 1.99% of total field output) peer-reviewed — Goadsby’s hypothalamic-imaging work is central to Section 3 below.

1.8 History in languages other than English

This chapter deliberately draws on non-Anglophone sources, since the historical record — like the patient experience discussed in Section 2 — is not confined to English-language medicine:

• German (richest single non-English historical source): ck-wissen.de’s historical wiki documents the Oppermann/Morgagni/Whytt 18th-century cases above.
• Italian: SISC guidelines; Italian Wikipedia’s own framing of the contested-priority debate; leadershipmedica.it’s (unconfirmed) claim about French coinage of “suicide headache”; a 2001 NEJM report of hypothalamic deep-brain-stimulation as a treatment, an Italian-led clinical first.
• Japanese: Hirayama Keizō’s clinical-neurology essay specifically on the difficulty of translating “cluster headache” into Japanese; a 2013 Rinsho Shinkeigaku phenotype study.
• Norwegian: Tidsskriftet (Norwegian Medical Journal), generally available only via English translation.
• Russian: a Med-Alphabet review that opens with a Russian translation of the original 1641 Tulp case.

No dedicated Swedish-language or Chinese-language primary historical source (as distinct from clinical/epidemiological sources, which are extensive — see Sections 3–4) was located in this research pass — flagged as a gap, not a confirmed absence.