Unusually Severe Bout in a Patient With a History of Cluster Headache Associated With COVID-19: A Case Report and Review of the Literature.

Although coronavirus disease 2019 (COVID-19) mainly exhibits respiratory symptoms, neurological symptoms are also reported, with headache being the most common neurological symptom. Headache associated with COVID-19 is widely reported. However, there are few precise case reports concerning headaches in patients with a history of migraine, tension headaches, or cluster headaches associated with COVID-19. Herein, we report a case of a woman with a history of cluster headaches who showed an unusually severe bout 10 days before typical COVID-19 symptoms. Such a case has not been reported until now.