As a pediatric physical therapist, one of the most common things I hear from parents is:
“My baby always looks to the right in the car seat.”
“They only sleep with their head turned one way.”
“Is it normal that they lean to one side?”
Sometimes this is an easy correction for a strap that’s out of place or not tightened well enough. But sometimes it can be an early sign that your baby needs extra support with neck strength, muscle balance, or positioning.
Because babies spend time in containers like car seats every day (as it’s unavoidable if you need to travel), those small positioning habits can add up over time.
First: Car Seats Are for Transportation
Car seats are essential for safety and should always be used correctly in the car.
But outside of travel, prolonged time in a car seat can contribute to:
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Head flattening (positional plagiocephaly)
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Neck tightness (torticollis)
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Preference for one side
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Delayed motor skill development
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Reduced opportunities for movement
Car seats naturally limit movement, and babies often settle into the same position repeatedly.
Why Does My Baby Always Turn to One Side?
There are a few common reasons:
1. Torticollis
Torticollis occurs when one side of the neck becomes tighter or stronger than the other. Babies may:
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Look one direction or “like” one side better
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Struggle to turn fully both ways
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Tilt their head
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Prefer feeding on one side
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Develop flattening on one side of the head
The car seat can make this more noticeable because babies are reclined and supported in the same position every ride.
2. Positional Preference (which IS a mild torticollis!)
Some babies simply develop a preferred side from:
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Their position in the womb
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Feeding patterns
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How they’re held
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Sleep positioning
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Time spent in containers
If unaddressed, a preference can become more pronounced over time and can lead to a moderate torticollis.
3. Muscle Imbalances or Weakness
Babies build strength through movement and position changes. If they spend long periods in one position, they may have fewer opportunities to strengthen both sides equally.
Why This Matters
When a baby repeatedly rests with their head turned to one side, we can start to see:
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Head Shape Changes
Constant pressure on one area of the skull may contribute to flattening. This can include:
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Flatness on the back or side of the head
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Ear shift
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Forehead prominence on one side
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Facial asymmetry including the eyes and jaw
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Neck Mobility Limitations
Babies may begin losing full range of motion turning the opposite direction.
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Feeding Difficulties
Neck tightness can affect:
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Breastfeeding comfort
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Bottle feeding position tolerance
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Latching
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Coordination during feeding
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Comfort during sleep
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Reflux patterns
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Delayed Gross Motor Skills
A side preference can impact:
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Tummy time
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Rolling and reaching abilities
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Midline control
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Crawling symmetry
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Overall movement patterns and milestone development
What Parents Can Watch For
Some signs that may be worth discussing with your pediatrician or pediatric PT include:
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Preference of looking in one direction
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Difficulty turning both ways equally
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Head tilt
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Flattening on one side of the head
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One shoulder appearing higher
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Trouble with tummy time
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Feeding preference on one side
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Arching or stiffness in the car seat
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Early rolling (especially to one side)
Tips for Better Positioning
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Alternate Visual/Auditory Stimulation
Babies naturally look toward light, voices, and interesting things. Try changing which side toys or caregivers approach from.
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Limit Container Time When Possible
Outside of travel, prioritize:
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Floor play
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Tummy time
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Babywearing
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Opportunities for free movement
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Reposition During Awake Time
Encourage your baby to look both directions during:
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Play
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Feeding
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Carrying
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Diaper changes
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Watch Car Seat Fit
Improperly adjusted straps or inserts can affect alignment. Make sure:
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Harness straps are snug and even
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Baby is centered
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Head isn’t consistently tilting or turning to one side
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Aftermarket inserts are avoided unless approved by the manufacturer
When to See a Pediatric PT
A pediatric PT can assess:
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Neck range of motion
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Muscle tightness
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Strength and symmetry patterns
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Head shape
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Motor development
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Positioning strategies
Early intervention matters.
The earlier we address asymmetries, the easier and faster they improve.
A baby consistently turning to one side in the car seat may seem small, but it can provide important clues about muscle balance, positioning, and development.
A preference is worth paying attention to.
Small adjustments, increased movement opportunities, and early support can make a big difference in comfort, feeding, head shape, and motor development over time.
Dr. Mary Claire Hartford Beirne, DPT, PT, IBCLC, CBS