4.9 Hypnic headache

A part-time florist reports headache attacks that have woken her from sleep on a near-nightly basis for the past four months. Each attack lasts close to ninety-five minutes before it fully resolves. Her sleep diary shows headache days recorded on thirteen nights in a typical month over this period, always at a similar point in the night regardless of bedtime. She specifically denies any watering of the eyes, nasal blockage or eyelid drooping when the headache is at its worst, and rather than becoming restless she prefers to remain motionless and simply wait it out.