How to Fix Baby Flat Head — Repositioning & Tummy Time (2026)

Discovering a flat spot on your baby's head can feel alarming — but the first thing to know is that positional flat head is common, and for most babies, there are practical measures that genuinely help. The second thing to know is that timing matters: the earlier you start, the more responsive the skull is to positional change.

Does Baby Flat Head Fix Itself?

Sometimes — but not always, and not reliably without some form of intervention. Mild positional flattening that's identified early and addressed with repositioning and tummy time often improves significantly as the baby becomes more mobile and the skull gradually firms up. Moderate to severe cases, or cases that aren't addressed until after four to five months, may show less natural improvement.

The phrase "they'll grow out of it" is sometimes true for very mild cases, but it shouldn't be relied upon as a strategy. Hair growth tends to mask flat spots, which is why some parents don't realise improvement hasn't fully occurred until the baby is older and hair is cut short. By that point, the window for easy, non-invasive change has passed.

When Is the Best Time to Start?

The bottom line: start as early as possible. You don't need to wait for a flat spot to be obvious — the measures that address flat head are the same measures that help prevent it. Beginning positional support in the first two weeks is far better than starting at eight weeks.

What Actually Works — Practical Steps to Take

1. 1

   Increase Tummy Time Immediately

   This is the most impactful single step you can take. Tummy time takes the back of the skull off any surface entirely, gives the flat area relief, and builds the neck and shoulder muscles that will allow your baby to change their own head position during sleep. Start with 2–3 minutes multiple times a day from the first week, and build up towards 30+ minutes spread throughout the day by 3 months. If your baby hates tummy time, our guide on making tummy time easier has specific strategies.

2. 2

   Reposition Actively During Rest

   Alternate which end of the cot your baby's head is at each sleep. Babies naturally turn towards stimulation (your face, the window, the door) — changing ends means the preferred direction works in your favour. If your baby always turns right, put stimulating things to their left during awake time. During rest, gently reposition the head to the non-preferred side if they've settled and can be moved without waking.

3. 3

   Switch to a Pressure-Distributing Support Pillow

   Flat, firm surfaces — cot mattresses, pram seats, car seat inserts — concentrate pressure at the back of the skull. An ergonomic concave support pillow designed to distribute that pressure across a wider surface area changes the contact geometry during every rest. The Ergo Sleep™ Baby Pillow uses an open-cell TPE core and concave centre for exactly this purpose. It won't fix an existing flat spot on its own, but as part of a broader approach it may help reduce concentrated pressure during the hours your baby spends resting each day.

4. 4

   Reduce Unnecessary Time in Car Seats and Bouncers

   These are necessary and safe for their intended purpose — but extended time in a car seat outside of the car, or spending hours in a bouncer, adds to the cumulative time the skull bears pressure in a fixed position. Try to limit their use to when they're genuinely needed.

5. 5

   See Your GP or Paediatrician Early

   Don't wait to see if it resolves on its own. A professional assessment tells you: whether the flattening is positional or structural, how significant it is, whether torticollis is contributing (which needs physiotherapy), and what timeline and measures are appropriate. Earlier assessment means more options.

What About Helmet Therapy (Cranial Orthosis)?

Helmet therapy involves a custom-moulded helmet that the baby wears for 23 hours a day over several months. It works by allowing the flatter areas of the skull to grow while applying gentle pressure to the more prominent areas, gradually reshaping the skull.

It's not a first-line treatment — it's typically recommended when:

• Positional measures haven't produced adequate improvement after several months of consistent effort
• The baby is between approximately 4–12 months old (the ideal window for helmet therapy)
• The degree of asymmetry is moderate to severe

Helmet therapy is effective when started at the right time. It's generally not recommended after 12–18 months because skull growth slows significantly. This is another reason why early assessment and early action matter — parents who wait and see past 6 months may find that helmet therapy is less viable or less effective.

What Doesn't Work

It's worth being clear about what won't address positional flat head:

• Waiting without any intervention — mild cases sometimes improve on their own, but moderate cases often don't, and the best window passes
• A support pillow alone — no pillow prevents or corrects plagiocephaly by itself; it's one tool within a broader approach that includes tummy time and repositioning
• Baby helmets bought without specialist input — helmet therapy is a medical treatment that requires proper fitting and professional monitoring
• Starting measures after 6 months — not impossible to see improvement, but far less effective than starting in the first few months

How Long Until You See Improvement?

Parents who start positional measures in the first 6–8 weeks often report visible improvement within 4–8 weeks of consistent effort. Key variables include the severity of the flattening, the consistency of the intervention, and how early it started. Improvement typically becomes most noticeable as the baby begins to move their own head more freely — usually from around 3–4 months.

Be patient but stay consistent. Take a photo from directly above the head each week in the same lighting — it's the most reliable way to track change without the distortion of hair and growth making it hard to compare.

Related reading: What Causes Baby Flat Head | Tummy Time and Flat Head | Baby Flat Head — When to Worry