Every baby comes into the world equipped with seven senses — not just the five you learned at school, but also proprioception (body awareness and position) and the vestibular sense (balance and movement). From the moment of birth, the brain is working overtime to make sense of the flood of sensory information arriving from all directions. For most babies, this calibration happens gradually and without drama. For others, sensory processing presents a genuine challenge.
Understanding sensory processing is not just useful for parents of children later diagnosed with sensory processing disorder or autism. It is relevant for every parent trying to understand why their baby settles easily in a dim, quiet room but becomes hysterical at a loud birthday party, or why one child loves the texture of sand while another screams when it touches their feet.
Sensory processing refers to the way the nervous system receives, organises, and responds to sensory input from the environment and from within the body. It is not simply about whether a baby can see or hear — it is about what their brain does with that information.
A well-regulated nervous system filters out irrelevant information (the hum of the refrigerator, the feeling of clothes on skin) while attending to what matters (a parent's voice, a hungry feeling). In babies, this regulation system is immature and still developing, which is why even typically developing newborns can be easily overwhelmed by too much stimulation.
Some babies have nervous systems that register sensory input more intensely than is typical. These children are sometimes described as "sensory sensitive" or "over-responsive." You might notice:
Over-responsive babies are often described as "high-need" or "difficult," and parents frequently blame themselves for not being able to soothe them. It is important to understand that these responses are neurological in origin, not the result of bad parenting or parental anxiety.
Less commonly discussed are under-responsive babies, whose nervous systems require more input to register sensation. These babies may seem unusually placid or difficult to engage, but some actively seek out intense sensory experiences:
Under-responsive babies are sometimes missed precisely because they are not distressed — they are quiet, content, and do not demand attention in the ways that over-responsive babies do.
Regardless of where your baby sits on the sensory spectrum, all babies benefit from varied, age-appropriate sensory play. The key is following your baby's lead and never forcing an activity they are distressed by.
For newborns and young babies: Skin-to-skin contact provides rich tactile input. Gentle massage using a baby-safe oil can help regulate the nervous system. Talking and singing provides auditory input at a comfortable, familiar frequency. Black and white visual patterns are high-contrast and easy for young eyes to process.
For babies who are over-responsive: Choose quieter, dimmer environments for play. Offer one sensory input at a time rather than layering music, toys, and conversation simultaneously. Use deep pressure — firm cuddles, swaddling, gentle compression — which many sensitive babies find calming. Introduce new textures gradually and without pressure, letting the baby observe first before touching.
For babies who are under-responsive: Provide proprioceptive input through gentle rough-and-tumble play, carrying in a sling, and baby massage with firmer pressure. Use bright colours and animated facial expressions. Introduce a variety of textures in a playful, unpressured way.
Water play: Most babies regulate well with water. A small tray of warm water with objects to splash and pour is rich in sensory information and can be adapted for almost any sensory profile.
Sensory differences exist on a spectrum, and most babies who seem sensitive or unusual in their sensory responses simply have a wider range of normal variation. However, there are signs that warrant a conversation with your health visitor or GP:
An occupational therapist (OT) with a specialism in sensory integration can assess your child and provide practical strategies. In the UK, you can ask for a referral through your health visitor or GP, or access private OT assessments if you prefer not to wait.
Noticing sensory differences early is genuinely useful. Early intervention does not necessarily mean diagnosis — it often simply means giving a child's nervous system the support it needs to develop the self-regulation skills that other children develop automatically.
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