Why this cuts across everything
Sensory differences turn up in autism, ADHD, dyspraxia, anxiety, trauma responses and in children with no diagnosis at all. They're also the most fixable thing on the list, because most of the fix is environmental and cheap.
If a child is struggling and you don't know why, the sensory environment is worth checking before anything else.
The eight senses
Five familiar ones — sight, hearing, touch, taste, smell — and three that get left out of the standard lesson:
Vestibular (balance and movement). Where the body is when it's moving: spinning, swinging, tipping, going downstairs. Some children can't get enough of it; others feel sick on a slide.
Proprioception (body awareness). Where the limbs are without looking, and how much force to use. Weak proprioception shows up as bumping into things, pressing too hard, breaking pencil leads, gripping too tight or too loose, and craving squeezes, heavy blankets and tight clothing.
Interoception (internal signals). Hunger, thirst, temperature, pain, needing the toilet, and the physical component of emotion. A weak or delayed interoceptive signal means a child doesn't notice they're hungry until they're furious, doesn't notice they're ill until they're very ill, and often can't answer "how are you feeling?" — because the information genuinely isn't arriving.
That last one explains an enormous amount of apparently unrelated behaviour: toileting accidents in able children, sudden inexplicable rages before lunch, not reporting injuries, and blank looks in emotional literacy sessions.
Over and under, at the same time
The common mistake is assuming a child is either sensitive or not.
Over-responsive (too much input getting through): covering ears, avoiding the canteen, distress at hand dryers, refusing certain textures or foods, hating labels and seams, struggling in crowds, complaining about lights nobody else notices.
Under-responsive (not enough getting through): not registering cold, pain or hunger; missing their name being called; seeming unaware of mess or of personal space.
Sensory seeking (actively pursuing input): constant movement, crashing into things, chewing clothing, touching everything, strong flavours, loud noise, spinning.
Most children are a mixture across the eight systems — over-responsive to sound, under-responsive to pain, seeking movement, all in the same child. And the profile isn't stable. Tolerance drops when a child is tired, ill, hungry, stressed or has been masking. A classroom that was fine in September can be intolerable in December with nothing about the room having changed.
What it looks like when it goes wrong
Sensory overload doesn't announce itself as a sensory problem. It presents as:
- Irritability and short fuse
- Inability to concentrate on work the child can do
- Refusing to enter a room
- Meltdown or shutdown, often over something trivial
- Fidgeting, silliness, escalating disruption
- Falling apart at home after holding it together all day
- Avoiding specific places: canteen, hall, corridors, changing rooms, toilets
Each of these gets logged as behaviour. Almost none of it is.
Auditing the environment
Walk the space with a child's sensitivity in mind and look for:
Sound. Strip light hum, projector fans, air conditioning, scraping chairs, corridor noise, bells, hand dryers, the canteen. Sound bounces badly off hard floors and bare walls.
Light. Flickering fluorescents, glare off whiteboards, sunlight through blinds, screen brightness. Natural light is generally better tolerated than overhead fluorescent.
Visual clutter. Densely covered walls and busy displays are constant low-level input.
Smell. Cleaning products, canteen, aerosols in changing rooms, staff perfume.
Touch. Uniform fabric, chair surfaces, queuing in physical contact, unexpected touch from behind.
Space. Corridors at changeover, assembly, crowded rooms, being in the middle rather than the edge.
Adjustments that work
Cheap, unglamorous and disproportionately effective:
- Ear defenders or loop earplugs, available without asking permission each time
- Turn off half the overhead lights; seat near natural light
- Leave lessons two minutes early to avoid the corridor
- An alternative to the canteen
- Seating at the edge or back, with a clear view of the door
- Fidget items that are permitted rather than confiscated
- Movement built in — jobs, errands, standing to work, a wobble cushion
- Heavy work before demanding tasks: carrying, pushing, pulling, climbing. Proprioceptive input is regulating for most children, and this is one of the most reliable tools available
- A named low-stimulus space, and an exit card that doesn't require an explanation
- Reduced visual clutter in the immediate working area
- Advance warning of fire alarms where possible
For interoception specifically: scheduled drink and toilet breaks rather than waiting for the child to notice, food at fixed times, and explicitly naming body states out loud — "my hands are cold, I'm going to put a jumper on" — which is how the connection between signal and meaning gets built.
Things to get right
Don't remove sensory tools as a sanction. Taking away ear defenders, movement or a fidget item because of behaviour removes the thing preventing worse behaviour.
Don't force exposure. Making a child sit in the hall until they get used to it doesn't desensitise them; it teaches them the environment is unsafe and you won't help.
Don't assume consistency is manipulation. Coping on Tuesday and not on Thursday is what fluctuating tolerance looks like.
Stimming is regulation. Rocking, flapping, pacing, humming, chewing. Suppressing it costs energy that then isn't available for learning. Intervene only if it's causing injury, and then by finding a substitute rather than removing it.
Be careful with claims. Sensory adjustments are practical accommodations with good face validity. Some commercial "sensory integration" programmes make stronger therapeutic claims than the evidence supports. Adjusting the environment is uncontroversial; buying a treatment package is a different question, and an occupational therapist is the right person to advise.
When to involve someone else
An occupational therapist is the relevant professional for a full sensory profile and individual programme, usually via GP or school referral. Waits are typically long, which is another reason to start with the environmental adjustments above rather than waiting.
Talk to the GP if sensory difficulties are severely restricting diet, sleep, toileting or the ability to leave the house — and note that significant food restriction on sensory grounds (sometimes called ARFID) needs proper clinical input rather than mealtime strategies.
General information for people supporting young people. Not medical advice and not an assessment tool. Sensory difficulties significantly affecting daily life should be discussed with a GP or occupational therapist.