Years ago head injury was thought to be a source of Cluster. Recent research raises serious doubts about how often that's the case.

Suggest that you print out the following message and drop it on your doc. The isse outlined is often not recognized by docs (in good measure because so many receive little education/training in complex headache disorders---this includes neurologists.
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Link to: cluster-LIKE headache:

IN: "Medications, Treatments, Therapies --> "Important Topics" --> "Cluster-LIKE headache"
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And print out.....


Curr Pain Headache Rep. 2006 Apr;10(2):130-6. Links
Head trauma and cluster headache.Manzoni GC, Lambru G, Torelli P.
Headache Centre, Department of Neurology, University of Parma and University Centre for Adaptive Disorders and Headache, Via Gramsci, 14, 43100 Parma, Italy. giancamillo.manzoni@unipr.it

Post-traumatic cluster headache (CH) is a very rare occurrence. Only one such case has been verified in the literature thus far. On the other hand, a non-casual association is almost certain to exist between previous head trauma and future CH onset. Considering the generally long interval of time separating the two events, it is not easy to accurately explain the nature of the head trauma/CH relationship. Head trauma may damage extra- or intracranial peripheral or central nervous structures, hence predisposing to the future development of CH. However, there also is the possibility that previous head injuries may be more frequent among CH patients because of their lifestyle, which may leave them more exposed to the risk of traumatic events.

PMID: 16539866 [PubMed