Can You Elevate or Incline a Baby Mattress? (Reflux, Congestion)

Your baby is bringing up milk, sounds bunged up, or wakes crying after every feed. Someone suggests putting a book, folded towel or pillow under the head of the mattress. Can you elevate a baby mattress? Is it safe to incline it for reflux or a cold? The short answer is that safer sleep advice is for a baby to sleep flat on their back on a firm mattress, so raising or tilting the mattress is generally not recommended unless a doctor has specifically told you to. This guide explains why, what to try instead, and answers the common questions about pillows, towels, wedges and sensor mats.

Elevating a Baby Mattress at a Glance

Why Safe Sleep Advice Says Keep the Cot Flat

• Babies slide. On a slope, a baby can slip down the mattress, which can bring their chin to their chest or push their face into the bedding.
• Added items change the surface. A pillow, folded towel, wedge or hardboard under the mattress makes the surface uneven and can leave gaps at the edges.
• Nothing has to be added to be safe. The Lullaby Trust recommends a firm, flat, waterproof mattress in good condition, with nothing soft in the sleep space. See our summary of the Lullaby Trust’s mattress and bedding advice.
• A flat surface is the baseline. Pram and carrycot guidance says the base must be flat, not sloping, and the same principle applies in a cot. Our guide to Moses baskets and cribs covers other sleep spaces.

Is It Safe to Incline a Baby Mattress? What Does the NHS Say?

The general UK safer sleep advice is to put your baby on their back, on a firm flat surface, in their own sleep space. Inclined sleep is something parents are advised to ask a health professional about. If a GP, paediatrician or health visitor has told you to raise your baby’s head, ask them:

• How high, and for how long.
• What product or method they recommend. Do not improvise with books, towels or pillows.
• How to keep your baby from slipping down.
• When to stop.

On a parenting forum, one mother whose GP suggested raising her 9-week-old’s head for reflux said she was worried because she had read that babies should sleep flat. Other parents suggested books under the cot legs, a rolled towel or a commercial wedge, but those replies were anecdotal and none addressed the safety question. That is exactly why you should ask your own doctor how, rather than copying a method from a forum. For the basics of a safe set-up, see our guide to putting your baby to sleep in a cot.

Can You Elevate a Baby Mattress for Reflux?

Reflux is common in babies and many grow out of it. You can:

• Keep your baby upright for a while after feeds, while awake, and supervised.
• Wind your baby during and after feeds.
• Offer smaller, more frequent feeds if your health visitor or GP suggests it.
• Check the feeding position and latch or teat flow with a midwife, health visitor or feeding specialist.

Speak to your GP if your baby is bringing up lots of milk, isn’t gaining weight, chokes, arches in pain, refuses feeds or has blood in vomit or poo. Seek urgent help if your baby has trouble breathing, turns blue or grey, or is unusually floppy.

Can You Elevate a Baby Mattress for Congestion or a Cold?

A blocked nose can make feeds and sleep harder because young babies breathe mainly through their noses. Instead of propping the mattress:

• Ask a pharmacist or GP about saline drops or other options suitable for your baby’s age.
• Keep the room at a comfortable temperature (not too hot). Our guide to winter-proofing a baby nursery has tips.
• Offer feeds little and often.

Seek medical help promptly if your baby is struggling to breathe, feeding poorly, has a high temperature or seems very unwell. Under three months, a high temperature needs urgent medical advice.

Pillows, Towels, Wedges, Hardboard and Lavender Bags

Why shouldn’t you put anything under your baby’s mattress? Items under a mattress can make the surface uneven or tilted, leave gaps, shift in the night and turn a firm, flat surface into an unpredictable one. That includes:

• A pillow or folded towel under the head end. Not recommended.
• A wedge under the mattress or in the cot. Not recommended unless advised by a healthcare professional for your baby.
• A lavender bag under or near the baby. Not recommended. It’s an extra item in the sleep space and it adds no proven safety benefit.
• Hardboard under the mattress. Some sensor pad instructions suggest a firm base if the cot slats are far apart. Follow the sensor pad maker’s instructions only, and make sure the mattress stays flat and fits the cot with no gaps.
• Books under the cot legs. It tilts the whole cot, but it can make the cot unstable. Not recommended unless a healthcare professional has specifically advised it and shown you how. See our cot safety guide.

Will an inclined mattress help baby gas? There’s no reliable evidence we found that tilting a cot mattress helps with wind, and winding and upright cuddles are safer.

How do you incline a mattress using a towel? We don’t recommend it. If a doctor advises raising the head end, ask them for specific instructions.

Which Mattress for a Baby Sensor Monitor?

Many parents ask about under-mattress movement monitors, particularly with a reflux or congested baby. Points to know:

• Safe sleep comes first. A report that quoted the Lullaby Trust said there is no conclusive evidence that using a monitor can prevent SIDS. Some parents find them reassuring. Some parents on forums say they cause anxiety, and that adults moving nearby can trigger false readings.
• Follow the maker’s instructions for the type of mattress and cot base. Some pads work with a mattress on the cot base, others need a firm board when slats are widely spaced. Check the manual.
• Where to put the sensor: place it under the mattress as directed, flat, and don’t add padding. Don’t use it to justify a soft or raised surface.
• A monitor is not a substitute for a firm, flat mattress and back-to-sleep.

Do you need an under-mattress baby monitor? No. It’s an optional extra. Our guide to baby mattress safety covers what really matters.

If you choose a mattress, a firm, flat sprung or fibre cot mattress that fits the cot properly is a sensible base. Babymore’s Pocket Sprung, Deluxe Sprung and Eco Fibre ranges are described on our product pages as firm and supportive. We have not tested them with any specific sensor pad, so always check your monitor maker’s compatibility list.

A Safe Night-Time Set-Up Checklist

• ☐ Firm, flat mattress that fits the cot (no more than a 3 cm gap per Babymore’s guidance). See our cot mattress size guide
• ☐ Baby on their back, feet to the foot of the cot
• ☐ Nothing under the mattress that you weren’t told to use
• ☐ No pillows, wedges, bumpers, toys or sheepskins
• ☐ Room temperature comfortable, baby not overheated (see baby sleeping bag vs blanket)
• ☐ Baby in your room for at least the first six months (see our newborn sleep setup guide)
• ☐ Reflux or congestion discussed with your GP or health visitor

See also our guides on how firm a baby mattress should be, whether a baby can sleep on an adult, air or floor mattress and adjusting the mattress base in a cot bed, which is about the base height, not tilting.

Final Thoughts

It’s natural to want to do something when your baby is uncomfortable, but propping or tilting the mattress is one of the changes safer sleep advice cautions against. Keep the surface firm and flat, hold your baby upright after feeds while awake, and speak to your GP or health visitor about reflux or congestion. If a professional advises a specific incline, follow their exact instructions.

Browse Babymore’s cot mattresses and cot bed mattresses, read our baby mattress safety guide, or see how to create a safe nursery environment.

Frequently Asked Questions