4.9 Hypnic headache

A retired shipwright reports night-time headache attacks that have persisted for some four months. He wakes from sleep with the headache most nights, and staff documented headache days on two occasions during his short stay, each episode running for a little over three hours before settling. He and his daughter estimate that this happens on around twelve nights of an average month, roughly one night in every two or three. He reports no facial flushing, no tearing of the eyes and no nasal congestion, and he remained settled in bed throughout rather than restless or thrashing about.