Morning headache

A morning headache is one present on waking or in the early hours. The timing is meaningful because several conditions affect the head overnight. Common and generally benign causes are frequent: poor or disrupted sleep, insomnia, grinding the teeth (bruxism) or jaw clenching, tension, a hangover, caffeine withdrawal overnight, and the 'rebound' headaches of overusing painkillers. Depression and anxiety are also linked to waking headaches. Beyond these, morning headache is a recognised clue to a few medical conditions. Obstructive sleep apnoea — where breathing repeatedly pauses in sleep, causing drops in oxygen and a build-up of carbon dioxide — classically causes a dull headache on waking, often with loud snoring and daytime sleepiness. Poorly controlled high blood pressure, especially if very high, can contribute. Conditions that raise carbon dioxide overnight (some lung diseases) do the same. Rarely, a headache that is worse in the morning, wakes a person from sleep, and is getting steadily worse — particularly with vomiting or new neurological symptoms — can signal raised pressure inside the head and needs prompt assessment. So while most morning headaches are benign, the pattern and company they keep matter.

• Poor or disrupted sleep, insomnia.
• Teeth grinding (bruxism) or jaw clenching.
• Medication-overuse (rebound) headache.
• Hangover or overnight caffeine withdrawal.
• Obstructive sleep apnoea — with snoring and daytime sleepiness.
• Poorly controlled high blood pressure.
• Depression or anxiety.
• Rarely, raised pressure inside the head — worsening headache, worse in the morning, with vomiting or new neurological symptoms.

Occasional morning headaches with an obvious cause (a poor night, a hangover, teeth grinding) do not need tests. When they are frequent, a review of sleep, medications and caffeine, and checking blood pressure, comes first. If sleep apnoea is suspected (snoring, daytime sleepiness, witnessed pauses in breathing), a sleep study is the key investigation; a blood gas may be considered where overnight carbon dioxide retention is a concern, and a blood count if anaemia is suspected. Imaging of the brain is reserved for red-flag features. Mediora.AI can highlight related markers for context, but morning headaches are assessed mainly clinically — through the sleep, blood-pressure and symptom pattern — with your doctor.