Reflux and sleep
They arch, they cry after feeds, and they will only sleep upright on someone. If reflux is genuinely in play, no amount of sleep work will help until the reflux is dealt with - and the most commonly suggested fix for it is unsafe.
3 min read
Some reflux is normal in babies. The muscle at the top of the stomach is immature, milk comes back up, and for most it is a laundry problem rather than a medical one. It peaks around four months and usually resolves by a year.
It matters when it causes pain, feeding refusal or poor weight gain. At that point you are not looking at a sleep problem with a feeding complication - you are looking at a feeding problem that is preventing sleep.
What helps
Upright for twenty to thirty minutes after feeds. While awake and held. Then down, flat, on their back.
Smaller, more frequent feeds. A smaller volume is less likely to come back up than a large one.
Thorough, unhurried winding. Both during and after the feed.
Check positioning and flow. A slower teat if bottle feeding; latch and position if breastfeeding. An infant feeding specialist is genuinely worth seeing.
See your GP. Where reflux is troublesome they may suggest thickened feeds, a formula trial, or medication. That is their decision and it is worth going for.
The thing not to do
Do not tilt or prop the cot mattress. Do not use wedges, positioners, nests or pods. Raising the head of the cot is suggested constantly and is not recommended: babies slide down into positions that compromise the airway, and any incline increases risk.
Nor should a baby with reflux sleep on their front or side. The back remains the safest position for every baby including those who spit up - the airway anatomy protects against choking, and the risk of the alternative is far greater.
Whatever the reflux, the mattress stays flat and the baby stays on their back. There is no version of this with an exception.
Then the sleep
Once feeding is comfortable, sleep usually improves substantially on its own. Any settling work waits until then - a baby in pain cannot learn to settle, and attempting it produces distress and no result.
Expect a lag of a week or two after the reflux is under control, because the association between lying down and discomfort takes a little while to fade.
Telling reflux from ordinary spitting up
Most babies bring milk back up and most of them are entirely fine. The distinguishing question is not how much comes up but whether it hurts. A baby who spits up cheerfully, feeds well and gains weight is a laundry problem. A baby who cries during or after feeds, arches, pulls off repeatedly, or refuses to feed at all is a medical one.
Weight is the check that settles most cases. A baby tracking along their own line on the chart, feeding well and content between feeds does not need investigation however messy things are. Faltering weight, feeding refusal or obvious pain changes the picture entirely and warrants an appointment rather than more sleep adjustments.
Things marketed for reflux that are not safe
Cot wedges, sleep positioners, nests and pods are all sold with reflux in mind, and none of them are recommended. Raising the head of a cot lets babies slide down into positions that compromise the airway, and any incline increases risk. Inclined sleepers have been withdrawn from sale in some countries for exactly this reason.
Nor is a car seat or bouncy chair a safe place for a reflux baby to sleep. The semi-upright position can let the head fall forward onto the chest and restrict breathing. Upright while awake and held is the version that helps; flat on the back, on a firm mattress, is the version for sleep.
When to stop troubleshooting
See your GP for poor weight gain, feeding refusal, persistent distress, blood or green colouring in the vomit, projectile vomiting, arching with obvious pain, or difficulty breathing during feeds. Any of these mean the sleep question waits.
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