Why is my cough worse at night?
Last updated September 3, 2026.
Lying flat is usually the answer: mucus from your nose drips down the back of your throat, and stomach acid travels upward more easily, and both set off the cough reflex. The NHS names both post-nasal drip and acid reflux as common cough causes, and notes reflux symptoms worsen when you lie down. Allergies can add a third push. Most coughs clear on their own within 3 to 4 weeks. Pymander is a free AI doctor, 24/7 by text, that can help you work out which mechanism is yours.
What to do
- Prop yourself up: extra pillows keep drip and acid away from your throat.
- Try hot lemon and honey: the NHS says it can work as well as cough syrup (never for babies under 1).
- Stop eating 3 to 4 hours before bed if the cough comes with heartburn.
- See a GP after 3 weeks, sooner if you are losing weight without trying or the cough is severe.
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