When Sights, Sounds, and Touch Feel Overwhelming: Understanding Sensory Processing

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Imagine a world where the hum of a refrigerator sounds as loud as a car horn, where the tag on the back of your shirt feels like sandpaper against your skin, and where the flicker of a fluorescent light overhead makes it impossible to focus on anything else. For some children, this is not imagination — it is everyday reality. Sensory processing differences can turn ordinary environments into sources of distress and can profoundly affect a child's ability to learn, play, and connect with others.

Occupational therapists are the professionals most often trained to assess and treat sensory processing challenges. Understanding what sensory processing is — and what happens when it does not work smoothly — can help parents make sense of behaviours that otherwise feel baffling or frustrating.

What is Sensory Processing?

Sensory processing is the way the nervous system receives, organizes, and makes sense of information from the environment and from within the body. Beyond the five classic senses — sight, hearing, touch, taste, and smell — there are three additional systems that are equally important: the vestibular system (movement and balance), the proprioceptive system (body awareness and force), and the interoceptive system (internal sensations like hunger and body temperature). When these systems work together smoothly, a child can sit calmly in a chair, tune out background noise, and hold a pencil with just the right amount of pressure. When they do not, everyday activities become exhausting and overwhelming.

Signs of Sensory Processing Differences

Children with sensory processing differences tend to fall into a few broad patterns, though many show a mix.

Some children are sensory over-responsive, perceiving ordinary input as too intense. They may cover their ears at a vacuum cleaner, refuse certain fabrics, gag at certain textures, or become distressed in busy environments. Their nervous system may stay in a state of fight-or-flight, making it hard to relax, learn, or engage socially.

Other children are sensory under-responsive, needing more intense or longer-lasting input to register what is happening. These children may seem sluggish, fail to notice their name being called, have a high pain tolerance, or not realize their face is messy. They may appear unmotivated when, in reality, their sensory systems are not registering input at a typical level.

Then there are sensory-seeking children who actively crave intense experiences — spinning without getting dizzy, crashing into furniture, chewing non-food items, or constantly touching everything. Sensory seeking is not misbehaviour; it is a genuine neurological need for more input to feel regulated.

The STAR Institute, a leading research and treatment centre for sensory processing, notes that studies suggest between 5 and 16 percent of children exhibit symptoms of sensory processing disorder. [REVIEW: clinical claim — verify with therapist]

How Sensory Processing Challenges Affect Daily Life

The impact can ripple through nearly every aspect of a child's life. A child over-responsive to tactile input may struggle with grooming — hair brushing can feel painful, tooth brushing may trigger a gag response, and clothing tags or seams can be unbearably distracting. A child under-responsive to proprioceptive input may press too hard or too lightly when writing, bump into walls and people, or seem physically clumsy. A sensory-seeking child may be unable to sit still in class, constantly rocking, fidgeting, or getting out of their seat because their body craves movement.

Mealtimes can be especially fraught. What looks like picky eating may actually be a sensory-based feeding difficulty — aversions to specific textures, temperatures, or colours that go beyond ordinary preference. Social situations can also be affected. A child overwhelmed by sensory input may avoid playdates and group activities. A sensory-seeking child may play too roughly, invade personal space, or struggle with social cues because sensory needs dominate their attention.

How Occupational Therapy Helps

Occupational therapists trained in sensory integration use assessment, direct therapy, and parent education to help children with sensory processing differences. The therapist observes how your child responds to different types of sensory input, talks with you about patterns at home and in the community, and may use standardized assessments.

Therapy often takes place in a sensory-rich environment — a gym with swings, climbing structures, crash pads, and tactile materials. The therapist guides the child through activities that provide the type and intensity of input their nervous system needs. A sensory-seeking child might get heavy work — pushing, pulling, carrying, climbing — that provides calming proprioceptive input. A child over-responsive to movement might gently be exposed to swinging and balance activities at a tolerable pace, helping their nervous system learn to process vestibular input more comfortably.

A key part of therapy is developing a sensory diet — a personalized set of activities done at specific times throughout the day. This might include bouncing on a therapy ball before homework, chewing gum during circle time, doing wall push-ups between tasks, or using noise-reducing headphones in loud environments. The goal is to provide the input the child's nervous system needs so they stay calm, alert, and ready to engage.

What Parents Can Do at Home

While therapy sessions build skills, the home environment is where sensory strategies are lived every day. Pay attention to patterns — when does your child seem most dysregulated? What environments or activities seem calming? Simple adjustments can make a big difference. Dimming lights, reducing background noise, offering a quiet corner with a beanbag chair and weighted blanket, building in movement breaks during homework, and respecting a child's sensory aversions while gently expanding their comfort zone are all ways parents can support sensory regulation.

Above all, understanding that your child's behaviour may be driven by a genuine neurological need rather than defiance or difficulty can shift the way you respond. A child who is melting down in a loud supermarket is not giving you a hard time — they are having a hard time. Approaching the situation with empathy and a sensory lens can lead to more effective and compassionate solutions.

Conclusion

Sensory processing differences can make the world feel like an unpredictable, overwhelming, or muted place for a child. When parents understand what is happening beneath the surface, they are in a much better position to help. Occupational therapy offers concrete, evidence-based strategies that can transform daily life — not by changing who a child is, but by helping their nervous system feel safer and more organized. If you recognize your child in any of these descriptions, reach out to Hearts Speaks Child Development Centre. An occupational therapist can help you understand your child's sensory profile and build a plan that works for your family.

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Sources:

• STAR Institute for Sensory Processing (sensoryhealth.org) — "Understanding Sensory Processing Disorder" and related pages: Provided the framework for understanding the eight sensory systems, sensory modulation patterns (over-responsive, under-responsive, seeking), sensory discrimination, and the neurological traffic jam metaphor from A. Jean Ayres. Also provided the statistic that 5–16% of children exhibit SPD symptoms, citing Ahn, Miller et al. (2004) and Ben-Sasson, Carter et al. (2009).
• Wikipedia — "Occupational therapy" (last updated July 2026): Provided background on sensory integration theory developed by A. Jean Ayres and the role of OTs in treating sensory processing differences in children.
• Understood.org — "What is occupational therapy?" by Gail Belsky, reviewed by Keri Wilmot (2019): Provided context on how OTs work on self-regulation, sensory processing, and motor planning with children.