In short
- The NHS says most coughs are caused by a cold or flu and usually clear up on their own within 3 to 4 weeks.
- Cleveland Clinic calls post-nasal drip one of the most common reasons people cough and says it's often worse at night when you lie down.
- The NHS says asthma symptoms, including coughing and wheezing, may be worse at night and early in the morning.
- The NHS lists a cough that keeps coming back as a possible symptom of acid reflux, and says reflux symptoms are often worse when lying down.
- Cleveland Clinic suggests raising your head, running a cool-mist humidifier at about 40% to 50% humidity and drinking warm fluids to ease a night cough.
- The NHS says to see a GP for a cough lasting more than 3 weeks, and to get urgent help if you're coughing up blood, have chest pain or find it hard to breathe.
Coughing at night is usually caused by something that gets worse when you lie down: mucus dripping down the back of your throat, stomach acid creeping up, or airways that tighten overnight with asthma. Colds and other infections, dry bedroom air and allergens in your bedding add to it. Most night coughs clear up on their own within a few weeks, and a few simple changes can help you sleep in the meantime. A cough that hangs on past 3 weeks, or comes with blood or breathlessness, needs a doctor.
Why is my cough worse at night?
Research: moderate (what this means)A cough is often worse at night because lying flat changes how mucus, stomach acid and your airways behave. Cleveland Clinic says post-nasal drip is often worse when you lie down, and the NHS says reflux symptoms are often worse lying down too. The NHS also says asthma symptoms may be worse at night and early in the morning.
Your bedroom can play a part. Cleveland Clinic points out that beds, pillows and blankets can be major sources of dust mites, an asthma trigger, and that many people are exposed to high dust levels in their bedroom without realizing it.
Cleveland Clinic's list of possible causes of a night cough includes colds and flu, bronchitis or pneumonia, whooping cough, reflux, asthma, allergies, sleep apnea, smoking and certain medicines, including NSAIDs, beta-blockers and ACE inhibitors. The NHS adds that most coughs are caused by a cold or flu, and that a cough is rarely a sign of something serious.
What are the common causes of a night cough?
The common causes of a night cough are infections, post-nasal drip, asthma, reflux, dry air and irritants. Each one has a slightly different pattern, which can help you and your doctor narrow it down.
| Cause | Clues it might be this | What helps, according to the sources |
|---|---|---|
| Cold, flu or other infection | Started with a cold, may linger for weeks | Rest, fluids, honey and lemon; NHS says it usually clears in 3 to 4 weeks |
| Post-nasal drip | Feeling of mucus at the back of the throat, throat clearing | Raise your head, saline spray, treat allergies |
| Asthma | Wheeze, tight chest, breathlessness, worse at night or early morning | See a GP; asthma needs proper treatment |
| Acid reflux | Heartburn, sour taste, cough after meals or lying flat | No food 3 to 4 hours before bed, raise the head of the bed |
| Dry air or mouth breathing | Dry mouth or sore throat in the morning | Humidifier at about 40% to 50%, keep the nose clear |
| Medicines | Dry cough after starting a new medicine | Tell your doctor; don't stop a prescribed medicine yourself |
Post-nasal drip
Post-nasal drip is extra mucus gathering and dripping down the back of your throat, and Cleveland Clinic calls it one of the most common reasons people cough. Cleveland Clinic lists a cough that bothers you more at night among its symptoms, along with throat clearing and hoarseness. It says allergies are one of the most frequent causes, along with colds and flu, sinus infections, a deviated septum, pregnancy, certain medicines and cold, changing or dry air. Cleveland Clinic also says lying flat on your back can make post-nasal drip worse. Our guide to post-nasal drip at night has more.
Asthma
Asthma can show up as a cough that wakes you. The NHS lists wheezing, coughing, shortness of breath and a tight chest as the main symptoms, and says they may be worse at night and early in the morning. It says to see a GP if asthma symptoms are waking you up at night.
Cleveland Clinic describes nocturnal asthma as asthma attacks while you're asleep or early in the morning. It lists dust in bedding, reflux and natural hormone shifts overnight as possible triggers. A separate Cleveland Clinic article notes that some people have a type of asthma where cough is the main or only symptom, often flaring with cold air, exercise or allergens. Our guide to mouth tape and asthma covers breathing at night with asthma.
Acid reflux
Reflux can cause a cough because stomach acid that travels up can irritate the throat and airways. The NHS lists a cough or hiccups that keep coming back and a hoarse voice among the symptoms of acid reflux, and says symptoms are often worse after eating, when lying down and when bending over. A Cleveland Clinic doctor says that if your cough shows up after meals, at night or when you're lying flat, reflux could be the reason. Our guide to sleep apnea and acid reflux explains how the two can overlap.
Dry air and mouth breathing
Dry air and mouth breathing can leave your throat dry and irritated at night. Cleveland Clinic lists dryness in the air among the causes of post-nasal drip. It also explains that your nose is designed to humidify the air you breathe and your mouth isn't, which is part of the reason you might wake up with a dry mouth or a sore throat after a night of mouth breathing.
We couldn't find a study showing that mouth breathing causes a night cough directly, so treat this as a possible contributor rather than a cause. If you wake with a dry mouth and a tickly cough, it's worth checking whether you breathe through your mouth at night. Our guide to signs you mouth breathe at night can help.
How do you stop coughing at night?
To stop coughing at night, ease the irritation at bedtime and treat the cause during the day. A Cleveland Clinic family physician suggests:
- Raise your head with an extra pillow or by lifting the head of the bed, so drainage doesn't collect at the back of your throat, but not so high that it hurts your neck.
- Sleep on your side rather than your back if you have a dry cough, to reduce irritation.
- Run a cool-mist humidifier in the bedroom, keeping humidity at about 40% to 50%.
- Drink hot herbal tea or warm water with honey to soothe the cough and loosen mucus, and stay hydrated through the day.
- Use a saline nasal spray to thin secretions, or gargle with salt water.
- Cut down on dust and allergens, for example with an air purifier and a shower before bed.
The NHS adds hot lemon and honey, though it says there's limited evidence that honey and herbal remedies help, and notes honey isn't suitable for babies under 1. For reflux, the NHS suggests not eating within 3 or 4 hours of bed and raising the head of the bed by about 10 to 20 cm so your chest and head are above your waist. Our guides to sleeping with your head raised and humidifiers for sleep go further.
Can nasal strips help a night cough?
Nasal strips don't treat a cough, but they can make nose breathing easier, which helps if a stuffy nose has you breathing through your mouth at night. Cleveland Clinic explains that the nose warms, filters and humidifies the air on its way to your lungs, while mouth breathing skips that.
What strips can't do is clear mucus, calm asthma or stop reflux, so they belong alongside the steps above, not instead of them. Our guide to how nasal strips work explains what they do.
Some people also use mouth tape to stay on nose breathing at night. Skip it while you have a cold or blocked nose: a Cleveland Clinic sleep specialist says never to use mouth tape if you have nasal obstruction or congestion, chronic allergies, a sinus infection, enlarged tonsils, a deviated septum or heart issues. Our guide to mouth tape with a cold covers this. We don't recommend mouth tape for children.
Check this first. Skip mouth tape and see a doctor if you snore loudly, wake up gasping, have been told you stop breathing in your sleep, or can't breathe comfortably through your nose. More on safety
When should you see a doctor about a night cough?
See a doctor if your cough lasts more than 3 weeks or comes with red-flag symptoms. The NHS says to see a GP if you've had a cough for more than 3 weeks, you're losing weight for no reason, or you have a weakened immune system.
The NHS says to ask for an urgent appointment or call 111 if:
- your cough is very bad or getting worse quickly
- you feel very unwell
- you have chest pain
- the side of your neck feels swollen and painful
- you find it hard to breathe
- you're coughing up blood
Cleveland Clinic also lists fever over 101.5°F (38.61°C), vomiting, swollen ankles and pink-colored mucus as reasons to see a doctor sooner. If a partner says you also snore loudly, stop breathing or gasp in your sleep, mention it, since Cleveland Clinic includes sleep apnea among possible causes of a night cough. If you're pregnant, the NHS says some medicines and herbal treatments aren't safe for you, so check the leaflet or ask a pharmacist first. Mention a lingering cough to your midwife or doctor too. Our safety page covers who should skip mouth tape.
Our pick (paid partner): TitanAir Nasal Strips
Once a doctor has ruled out anything serious, our pick for keeping your nose open at night is TitanAir Nasal Strips. They won't stop a cough, but they can make nose breathing more comfortable while you recover. We haven't tested or ranked nasal strips ourselves; this is our recommendation.
Titan describes them as drug-free external nasal dilators with flexible spring-loaded bands. It says to place the strip just above the flare of the nostrils, on the soft part of the nose rather than the bony bridge, on clean, dry skin without moisturizer, and to remove it by loosening it with warm water and peeling slowly from the ends inward. Titan says they're designed to pair with Titan Bamboo Silk Mouth Tape once your nose is clear, that every batch is third-party tested and certified PFAS-free, and that its 30-night guarantee refunds you if your sleep isn't better after 30 nights.
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Common questions
Why do I only cough at night?
Lying down changes how mucus and stomach acid move. Cleveland Clinic says post-nasal drip is often worse at night when you lie down, and the NHS says reflux symptoms are often worse lying down. Asthma symptoms may also be worse at night, according to the NHS. Dust and other allergens in bedding can add to it.
How do I stop coughing at night?
Cleveland Clinic suggests raising your head with an extra pillow or by lifting the head of the bed, running a cool-mist humidifier, drinking warm fluids such as tea with honey, and using saline spray to thin mucus. Treating the cause, such as allergies, reflux or asthma, matters most if the cough keeps coming back.
When should I worry about a cough at night?
The NHS says to see a GP if your cough lasts more than 3 weeks, you're losing weight for no reason or you have a weakened immune system. Get urgent help if you're coughing up blood, have chest pain, find it hard to breathe, or the cough is very bad or getting worse quickly.
Can mouth breathing cause a cough at night?
No study we found shows that mouth breathing causes night cough directly. But Cleveland Clinic explains that your nose humidifies the air while your mouth doesn't, which is part of why mouth breathers can wake with a dry mouth or sore throat. A dry, irritated throat may make a tickly cough worse.
Is a night cough a sign of asthma?
It can be. The NHS lists coughing among the main asthma symptoms and says they may be worse at night and early in the morning. Cleveland Clinic notes that for some people with asthma, cough is the main or only symptom. A GP can test for asthma if your cough keeps waking you.
Should I sleep sitting up with a cough?
Not fully upright, but propped up helps. A Cleveland Clinic family physician says elevating your head is probably the best position, using an extra pillow or by raising the head of the bed, so drainage doesn't collect at the back of your throat. She also says not to raise it so much that it strains your neck.
Sources
About this article
- Research
- 10 published sources, listed above.
- Evidence
- Moderate. How we rate it
- Last checked
- November 2, 2026
- Funding
- Paid partner of Titan Recovery. Their ads are labeled.
- Found an error?
- Tell us. We log fixes on the corrections page.
* This content is for informational and educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure or prevent any disease or health condition. Talk to a qualified healthcare provider about your health.
