Red flags — seek medical review if:
- The baby is unusually difficult to wake, limp, or has pauses in breathing that last more than a few seconds and recur.
- Skin colour looks blue or grey around the lips or face, especially during or after sleep.
- The baby was born prematurely or has a known breathing or heart condition — ask your clinician for tailored sleep advice rather than relying on general guidance alone.
If your baby has a fever, remember: fever of 38°C or more in a baby under 3 months is an emergency — do not give paracetamol and wait; seek urgent medical care.
Why sleep position and setup matter
A newborn's ability to move away from something covering their face, to regulate their own breathing during deep sleep, and to wake themselves if oxygen drops is all still maturing. This is part of the reason sleep-related infant death is more common in the first year of life than at any other stage of childhood, and why the way a baby sleeps — not just how much they sleep — has become one of the most closely studied areas in infant health. The good news is that a small number of consistent habits are associated with a large reduction in risk, and they are simple to put into practice from day one.
What a safe sleep space looks like
- Always place the baby on their back to sleep, for every sleep, day and night, until at least their first birthday.
- Use a firm, flat sleep surface — a cot or bassinet with a well-fitted mattress and a fitted sheet only.
- Keep the sleep space clear: no pillows, loose blankets, duvets, cot bumpers, or soft toys within reach.
- Dress the baby in a well-fitted sleep sack or similar instead of loose blankets, to avoid coverings sliding over the face.
- Room-share, not bed-share: the safest place for a baby to sleep is in their own cot or bassinet in the parents' room, ideally for the first six months.
- Avoid overheating — a room that feels comfortably cool to an adult in light clothing is usually right; overdressing and heavy bedding both raise risk.
- Never sleep with a baby on a sofa, armchair, or any soft or unsupervised surface, and avoid bed-sharing altogether if either parent smokes, has taken alcohol, sedating medication, or is extremely tired.
- Breastfeeding, where it is happening, is associated with a lower risk and is worth continuing alongside these other steps, but it does not replace them.
Everyday reassurance
Babies naturally move, grunt, twitch, and briefly stop breathing for a second or two during active sleep — this is normal newborn sleep physiology and is not, by itself, a sign of danger. A dummy/pacifier offered at sleep times is considered protective by many guidelines once feeding is well established, though this is a personal choice. Swaddling can help some very young babies settle, but must stop being used for sleep once a baby shows any sign of trying to roll, since a swaddled baby who rolls onto their front cannot free their arms to reposition.
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Message us on WhatsAppClinical thresholds in this page were reviewed and signed off by Dr Didier Decamps on 17 August 2026. This is general information and does not replace an individual assessment by a qualified clinician.
Written with AI assistance. Reviewed, corrected and signed by Dr Didier Decamps, paediatrician.
Last reviewed: 17 August 2026