It is half past ten, the thermometer is still on the chest of drawers, and your child wakes for the fourth time because their nose is completely blocked. Every burst of coughing pulls them out of sleep again, and at some point the two of you are lying sideways across the bed, simply exhausted. When a child has a cold, sleeping becomes a test of patience for the whole family - and that happens four to eight times a winter, because that many infections are entirely normal once nursery and kindergarten are part of life. The good news: you cannot make the cold disappear, but you can improve the conditions considerably. Humidity, temperature, fluids and a stripped-back evening routine make the biggest difference on sick nights. This guide gives you concrete figures, an overview by symptom, a six-step evening routine and clear warning signs for a trip to the practice.
The short answer: a child with a cold sleeps better in a cool room with moist air - 16 to 19 °C at roughly 40 to 60 per cent humidity. Add regular small amounts to drink, saline nose care after checking with your paediatrician or pharmacy, and a gentle elevation of the upper body where it is age-appropriate and possible without loose pillows in the bed. Keep the evening short, calm and predictable, allow daytime naps and bring bedtime forward. Everything else - medication above all - belongs in the hands of your paediatrician.
- Cool and moist rather than warm and dry: 16 to 19 °C, humidity of 40 to 60 per cent, wide-open airing three to four times a day.
- Drinking beats everything: small amounts every one to two hours, and water within reach at night.
- Raise the upper body only where it suits the age - with a baby, no loose pillows or blankets in the cot.
- Change bed linen more often, air the mattress for 20 to 30 minutes each morning, and favour washable textiles.
- Go to the practice without delay for breathing difficulty, wheezing, high fever or refusal to drink - and always early for babies.
Why a cold disrupts sleep from several directions at once
A cold does not upset sleep for one reason but for four at the same time. Young children prefer to breathe through the nose, and their nasal passages are only a few millimetres wide - once the lining swells, there is barely any space left. Your child then switches to mouth breathing, the throat dries out, and that dryness is exactly what triggers fresh coughing. Lying down adds a second mechanism: mucus runs to the back of the throat and irritates the lining directly. That is why many parents hear the cough mainly in the first two hours after their child falls asleep, and again at around four or five in the morning. Third, fever makes sleep lighter: the child sweats, wakes more often and seeks more closeness. And fourth, the usual daytime movement is missing because playgroup and the playground are off - so there is less sleep pressure in the evening. Five or six short wakings a night are normal during this period, even in children who otherwise sleep through reliably. For the other patterns that can sit behind night waking, read our article on a child waking up at night.
Room climate: 16 to 19 °C and around 40 to 60 per cent humidity
The biggest lever is not in the bed but in the air. Cool air is kinder to irritated airways than warm air, so 16 to 19 °C remains the right range even on sick days; for babies, around 18 °C is the reference point. Turning up the heating is counterproductive, because warm air holds less relative humidity and dries the mucous membranes further. Aim for roughly 40 to 60 per cent humidity - a simple hygrometer for ten to twenty francs shows you where you stand. Air the room three to four times a day for five minutes with the window wide open rather than permanently ajar, and once more right before bedtime. To lift the humidity, something simple is usually enough: a shallow bowl of water on the radiator, a damp towel over the heating or a chair, or the drying rack in the next room. Electric humidifiers work too, but they need daily rinsing and fresh water, otherwise they spread germs. For the figures across the year, see room temperature in a child's bedroom.
Child with a cold: sleeping despite a blocked nose
If the nose is the main reason for waking, saline or sea-water nose care is worth it - but please check with your paediatrician or pharmacy first, because age, form and application differ a great deal. The best moment is around ten to fifteen minutes before lying down, so the mucus loosens before your child is in bed. Fluids matter just as much: thin mucus drains instead of sitting tight. Offer small amounts every one to two hours through the day - water, unsweetened tea, and for older children warm milk if they tolerate it well. At night a beaker or a straw cup within reach is enough; you do not need to wake your child for it. A gentle elevation of the upper body of around 10 to 15 degrees can soften the urge to cough, ideally created under the mattress or under the bed legs at the head end rather than with stacked pillows. None of this applies to babies in the first year: back sleeping stays the rule, and loose pillows or extra blankets have no place in the cot. For babies, clear any elevation with your practice beforehand.
Room climate and care by symptom
A blocked nose, a cough and a fever do not call for the same approach. The overview below sums up which figures and which care belong in the foreground - and what to keep an eye on in each case. The values are guides for the night; measure at bed height rather than right next to the radiator, or the thermometer will be two to three degrees out.
| Symptom picture | Temperature | Humidity | Care focus | Watch out for |
|---|---|---|---|---|
| Blocked nose | 17–19 °C | 50–60 % | Nose care 10–15 min. before lying down, bowl of water, plenty to drink | Mouth breathing dries the throat |
| Cough, mainly at night | 16–18 °C | 50–60 % | Damp towel, upper body 10–15° higher where age-appropriate, airing just before bed | Have wheezy breathing checked straight away |
| Fever | 16–18 °C | 40–50 % | Light clothing, a thin blanket, small drinks every 1–2 hours | Do not bundle up warmly, change linen daily |
| Baby, any symptom | approx. 18 °C | 40–60 % | Back sleeping, sleeping bag instead of a blanket, closeness and frequent feeds | See the practice early as a matter of principle |
Naps, bedtime and closeness: the rhythm is allowed to wobble
On sick days the plan takes a back seat for a while. Allow daytime naps, even if your child has in principle already given up the midday sleep - here sleep is recovery, not habit. Expect an unwell child to need one to two hours more sleep a day than usual, spread across an afternoon nap and a night that starts earlier. Bring bedtime forward by 30 to 45 minutes, because children with a cold take longer to settle, and three short wakings afterwards are far easier to carry if they do not start at ten in the evening. Closeness is part of it: reading in bed, a hand on the back, a night light that normally stays off. That is not a step backwards but the fitting answer to an exceptional situation. On the third symptom-free day, say kindly but clearly that the old rules are back - things then usually sort themselves out within three to seven days. For winding the midday nap down deliberately later on, see dropping the nap.
The evening routine on sick days: 6 steps
On sick days a new ritual does not help; a shortened version of the familiar one does. This sequence takes around 40 minutes and works even with a fever.
- Wind down from 5.30 pm: no screens, dimmed light in the living area, quiet floor play instead of rough and tumble.
- A light supper without pressure: soup, bread, yoghurt, banana - and if your child wants nothing, drinking is enough. Nobody has to eat.
- Air the room, then add moisture: window wide open for five minutes, then a bowl of water on the radiator or a damp towel hung up. Check the temperature: 16 to 19 °C.
- Nose care and washing: saline as agreed with the practice, then a lukewarm wash rather than a long bath. Fresh pyjamas, and new bed linen if there has been sweating.
- Prepare the bed: upper body slightly raised where age-appropriate, a thin blanket to push back, a cup of water and tissues within reach, night light on its lowest setting.
- Read briefly and close by: ten minutes, the same story as always, then a hand on the back and stay until the breathing is calm.
Keep the sequence identical on every sick day. That predictability takes more stress out of the evening than any extra measure.
Common mistakes on cold nights
Four things happen particularly often on sick nights - and they tend to make matters worse rather than better.
- Wrapping the child up too warmly. Thick pyjamas, two blankets, heating at 22 °C: the child sweats, wakes up because of it, and the dry air irritates the airways further. Dress them lightly and offer a thin blanket to push back.
- Not airing the room. For fear of the cold, the window stays shut. Yet stale, dry air is precisely the problem. Five minutes wide open does not chill the walls, but it does exchange the air completely.
- Giving cough syrup or nasal drops off your own bat. Many preparations are not suitable for young children, and decongestant nose drops come with strict age limits and time limits. Anything beyond saline belongs with your paediatrician first.
- Pushing your child to eat. A poor appetite is normal with an infection and usually lasts two to three days. What matters is that your child drinks. Pressure at the table costs energy the body needs elsewhere.
Bed hygiene during and after the infection
Cold viruses survive on textiles for a while, and fever sweat leaves the bed damp. Change the bed linen every two to three days during the infection, and daily with a fever and heavy sweating. Wash covers, pillowcases and the sleeping bag at 60 °C where the care label allows it - the favourite soft toy can go in too, ideally in a laundry net and in the morning so it is dry again by bedtime. Air the mattress for 20 to 30 minutes every morning: push the blanket back, open the window wide, and do not remake the bed straight away. Standing it on its other side once a week helps against residual moisture that would otherwise collect in the core. After the infection a complete round is worthwhile: bed linen, mattress cover, soft toys and any curtains near the bed. Anything that comes off and washes at 60 °C proves practical and saves a lot of effort in winter; for looking after upholstered beds, see cleaning an upholstered kids bed, and for covers see the washable mattress cover.
When to see your paediatrician
Most colds are over after about a week, and a residual cough can linger for two to three weeks. Some signs, though, mean you should not wait. Seek advice quickly or as an emergency for breathing difficulty: fast, shallow breathing, drawing in between the ribs or at the base of the neck, flaring nostrils, or pale or bluish lips. The same goes for wheezy, barking or noisy breathing on the in-breath, high fever, fever lasting more than three days or rising again after an improvement, marked listlessness and unusual apathy, refusal to drink or noticeably fewer wet nappies, severe earache, and a rash that does not fade under pressure. For babies under three months the rule is simple: see the practice early, even with apparently harmless symptoms, because infections change quickly at that age. And regardless of any list: if your gut feeling says something is different from the last colds, phone. The parent and child advisory service can also take some weight off everyday questions.
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Frequently asked questions about sleep during a cold
How warm should the bedroom be when my child has a cold?
A child with a cold usually sleeps best between 16 and 19 °C, and around 18 °C is the reference point for babies. Turning up the heating does not help, because warm air dries out the nasal lining. What matters is air that is not too dry and brief airing several times a day.
Can I raise my child's upper body at night when they have a cold?
For toddlers, an incline of about 10 to 15 degrees is fine, ideally created under the mattress rather than with a pile of pillows. During the first year, no loose pillows or blankets belong in the cot. For babies, check any elevation with your paediatrician first.
Does a humidifier help with a blocked nose and a cough?
Humidity of 40 to 60 per cent thins out mucus and irritates the mucous membranes less. A bowl of water, a damp towel or the drying rack is often enough. Electric devices need daily rinsing, otherwise they spread germs.
My child coughs almost only at night - is that normal?
That is typical of a cold. Lying down, mucus runs to the back of the throat and irritates the lining, which is why the cough is worst after falling asleep and early in the morning. If a night-time cough lasts longer than two weeks or sounds wheezy, have it checked.
Should I wake my child at night to drink when they have a cold?
Waking them is unnecessary, as sleep is valuable in this phase. Put a cup of water by the bed and offer a few sips at every waking. What counts is the amount over 24 hours: if your child drinks noticeably less than usual, contact your practice.
How long until my child sleeps normally again after a cold?
Symptoms usually peak on days two to four, and the cold settles after about a week. A residual cough can linger for two to three weeks. After that, allow three to seven days for the familiar sleeping patterns to return.
This article provides general information only and does not replace paediatric advice. If symptoms persist, please contact your paediatrician.
