Sensory Processing
About a 9-minute read — the short version just below covers the essentials, and every figure on this page is sourced. Last updated 1 September 2026.
The word “sensitive” has done a lot of damage here. It suggests a dial that could be turned down with enough willingness, when what is actually being described is which information reaches you and how loudly. That is not a preference, and it is not something you are doing.
What are sensory processing differences?
Sensory processing differences are variations in how a nervous system registers and filters incoming sensory information. Input that most people screen out automatically — background noise, fluorescent flicker, the seam of a sock — can arrive at full volume and stay there, and other input can barely register at all.
This is not a fringe feature of autism. Since 2013, hyper- or hyporeactivity to sensory input has been written into the diagnostic criteria themselves — one of the more significant changes DSM-5 made, and a formal acknowledgement of something autistic people had been reporting for decades while it was treated as an incidental quirk rather than part of the thing being described.
The three patterns
Hypersensitivity
Sensory input registers as more intense than expected. Sounds are louder, textures more irritating, lights more glaring. Input that others barely notice can be overwhelming or painful.
Hyposensitivity
Sensory input registers as less intense, or may not register at all. Pain thresholds may be higher; temperature, hunger, or physical discomfort may go unnoticed until they're extreme.
Sensory seeking
Actively seeking strong sensory input — loud music, tight clothing, intense textures, movement, pressure. The nervous system needs more input than the environment naturally provides.
Most neurodivergent people experience a mix — hypersensitive in some channels, hyposensitive or seeking in others. This combination can look contradictory from the outside: needing silence but also wearing headphones playing music at volume; hating light touch but craving deep pressure.
One thing this does not appear to depend on is sex, which is worth saying on a site that otherwise spends a lot of time on how differently autism gets recognised in women. A meta-analysis of narrowly defined autistic traits found autistic males scored higher on stereotyped behaviours and on restricted interests — and found no significant difference at all in sensory experiences. Whatever causes women to be missed, it does not look like their sensory world being quieter.
Is sensory processing disorder a real diagnosis?
Not as a standalone condition. Sensory processing disorder appears in neither DSM-5 nor ICD-11, and you cannot be formally diagnosed with it. What is recognised is narrower and, for most people reading this, more useful: since 2013 hyper- or hyporeactivity to sensory input has been part of the diagnostic criteria for autism itself.
The practical consequence is worth knowing before you go looking for help. An occupational therapist may well work with you on sensory needs without any diagnosis at all, because the adjustments do not require one. But if you are seeking formal recognition — for workplace adjustments, say — the route runs through an autism or ADHD assessment rather than a sensory one, and the sensory difficulties are evidence within it rather than the thing being assessed.
The sensory channels
Sensory processing differences affect more than just the five traditional senses.
Sound (auditory)
Background noise that others filter out — conversations, air conditioning, traffic — may be impossible to tune out. Sudden sounds can be startling and distressing. Some pitches and tones physically hurt.
Light and visual input
Fluorescent lighting, bright screens, visual clutter, and busy environments can cause headaches, eye strain, or overwhelm. Flickering light and repeating patterns bother a lot of people too.
Touch (tactile)
Clothing textures, seams, labels, or fabric types may be unwearable. Light unexpected touch can be deeply unpleasant even from people you like. Deep pressure (hugs, weighted blankets) may feel regulating rather than intrusive.
Smell (olfactory)
Strong smells — cleaning products, perfume, food, public spaces — can be overwhelming to the point of triggering nausea or requiring exit from a space.
Taste and food textures
Texture, temperature or a particular taste can make eating hard work. Food refusal or a narrow diet is often sensory-driven rather than preference. This is frequently misunderstood in both children and adults.
Proprioception (body position)
The sense of where your body is in space. Proprioceptive seeking — crashing, pressing, carrying heavy things — is common and self-regulating. When this sense runs quietly you bump into things, misjudge gaps, and lose track of where your body is.
Interoception (internal body signals)
The sense of internal states: hunger, thirst, pain, temperature, the need for the bathroom, emotional states. A lot of Autistic and AuDHD people read these signals poorly. You do not notice you are hungry, or cold, or need the loo, until it is urgent.
Vestibular (movement and balance)
The sense of movement, balance, and spatial orientation. Some people seek vestibular input (spinning, swinging, rocking); others are sensitive to it and find motion sickness or balance challenges significant.
Sensory overload
Sensory overload is what happens when more is coming in than you can process. It stacks up. It is rarely one loud noise — it is the noise plus the lights plus the smell plus the two hours you have already spent there. It's a physiological state, not a choice. Signs include:
Overload is cumulative and has a lag. You might hold it together in a difficult environment and then crash once you're home — not because home is worse, but because you've been managing the load all day and finally reached your limit.
Why does sensory overload make me so anxious?
Because for a lot of people the anxiety is downstream of the sensory load rather than beside it. Testing three competing models in adults, researchers found the best-fitting one had sensory over-responsivity and stress acting as the route by which autistic traits led to anxiety — the sensory load coming first and the anxiety following.
If that ordering is right for you, it changes where the effort is worth spending. Treating the anxiety while the environment stays the same is working on the symptom at the far end of the chain. The authors' own suggestion was the other end: sensory-neutral environments as a way of preventing anxiety and stress, not merely accommodating them once they arrive.
What this might look like for you
What actually helps?
The cheapest adjustments carry most of the benefit, and almost none of them require anyone's permission. Start where the load is heaviest for you rather than working through the list.
| Channel | Usual culprit | Cheapest thing that helps |
|---|---|---|
| Sound | Layered background noise rather than one loud thing | Loop-style filter earplugs — they lower the floor without cutting you off from speech |
| Light | Overhead fluorescents and their flicker | A desk lamp with the overheads off; warm bulbs; a cap indoors |
| Touch | Seams, labels, waistbands, unpredictable contact | Buying multiples of the one garment that works, and cutting every label out |
| Interoception | Not noticing hunger, thirst or needing the loo until it is urgent | Timers and a visible water bottle — external cues, since the internal ones are quiet |
| Cumulative | A day that was survivable until suddenly it was not | Booked recovery time after known-expensive events, before you need it |
Identify your sensory profile
Know which channels are most sensitive for you, and which conditions trigger overload fastest. This is self-knowledge, not a limitation — it lets you make better decisions about environments and capacity.
Reduce input where you can control it
Noise-cancelling headphones. Sunglasses indoors. A seat away from the speaker or the air vent. Clothes that feel right. Small changes, and they add up fast.
Build recovery into your schedule
High-sensory environments (shops, offices, social events) have a cost. Scheduling quiet, low-stimulation time afterward isn't indulgent — it's maintenance. Not scheduling it is what leads to overload.
Stim
Stimming — repetitive movements or sensory input that helps regulate the nervous system — is a valid and effective self-regulation strategy. Rocking, tapping, fidgeting, wearing headphones, using a weighted blanket: these work. Let yourself use them.
Communicate your needs
In workplaces and relationships where it's safe to do so, naming your sensory needs reduces the daily effort of managing them alone. You don't owe anyone an exhaustive explanation, but stating what you need clearly is almost always more effective than masking and hoping.
Explore your own patterns
The free OddlyWired self-assessment — no email needed, it runs entirely in your browser — includes questions about sensory experience across the Autism and ADHD modules. If sensory differences are a significant part of your experience, the results may help you understand your profile more clearly.
It's a self-exploration tool, not a diagnostic instrument.
If planning around your energy rather than the clock sounds useful, the OddlyWired Planner is built that way — there's a free starter kit, no email needed.
Take the self-assessment →