睡前喝咖啡不会失眠？7旬老人靠它告别两年深夜头痛

Brief (coffeeyo.com): Could a cup of coffee at bedtime really help you sleep? For a woman in her seventies plagued by “hypnic headache”, that was exactly what doctors prescribed — and two years of night-time pain finally faded. The caveat: it works only after a firm diagnosis, under medical supervision.

For most people, coffee is a pick-me-up. For Granny Li, it became the key to a good night’s sleep. On 15 September, Shangyou News learned from Southwest Hospital of Army Medical University that its neurology department had recently treated an elderly patient who, for the past two years, had suffered headaches late every night — and the doctor’s solution, improbably, was “a cup of coffee before bed”.

Granny Li’s “hypnic headache”: a bedtime coffee was the prescription

For more than two years, the life of Li Ying (a pseudonym), a woman in her seventies, was upended by a headache that struck with clockwork precision. “Between 1 and 2 a.m. it arrived right on schedule, like a broken alarm clock planted inside me,” she said. At its worst it came with nausea, vomiting and sensitivity to light.

Her family took her from one hospital to another, but no one could find the cause and her symptoms did not improve in the slightest. Recently they came to the dedicated headache clinic in the neurology department of Southwest Hospital, Army Medical University.

Xiao Li, associate chief physician in the hospital’s neurology department, took a detailed history and used the relevant tests to rule out secondary headaches before arriving at a diagnosis Granny Li had never heard of: hypnic headache.

His proposed treatment was just as startling: “There is no need for any other medication. Just drink a cup of coffee every night before bed.”

“My headaches already keep me awake — won’t coffee at bedtime make the insomnia worse?” Granny Li followed the advice to the letter, full of doubt. To her surprise, the night-time headaches that had troubled her for over two years gradually disappeared.

Using coffee to treat hypnic headache requires medical supervision

So how could a single cup of coffee resolve a headache that had resisted treatment for so long?

Xiao Li explained that Granny Li’s was a rare type: hypnic headache, whose defining feature is that it strikes during sleep in the small hours and recurs frequently month after month — a perfect match for her symptoms.

Medicine currently links the condition to a disturbance of the body clock that regulates sleep. Caffeine, by blocking adenosine receptors, can interrupt the signalling pathways in the nervous system that may trigger the headache, so a small dose before bed acts like a gate set in advance against an attack that might otherwise come during the night.

“Clinically, a cup of coffee before sleep — roughly 60-200 mg of caffeine — is one of the recognised first-line treatments for hypnic headache,” Xiao Li said.

Effective as coffee can be for hypnic headache, it is no cure for every headache, and it certainly does not mean anyone may self-medicate with a bedtime cup to stop pain.

Caffeine at bedtime can make falling asleep harder and worsen insomnia; it can also bring on palpitations, tremors and anxiety, raise blood pressure, or cause digestive reactions such as stomach discomfort, acid reflux and gastro-oesophageal reflux. Heavy long-term use can lead to dependence, with rebound headaches once it is stopped, and caffeine may interact with certain medicines, altering their effect or intensifying side effects. None of this should ever be copied or tried on one’s own. When a doctor prescribes coffee as treatment, it is an individualised medical decision made only after a clear diagnosis, the exclusion of other diseases and a full assessment of co-existing conditions and medication history. The exact dose, timing and form of caffeine all require professional adjustment; some patients may need a more controllable form such as caffeine capsules rather than an ordinary cup of coffee.

More importantly, hypnic headache is far from the only headache that strikes at night. Drinking coffee for pain without a confirmed cause can easily mask the real condition and delay diagnosis and treatment.

By Shi Heng, Shangyou News.

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