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Sensory Processing Disorder: Signs, Subtypes, and Support

Expert-reviewed guidance on sensory processing differences — the eight systems, the patterns they form, and what actually helps day to day.

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Reviewed by Dr. Eva Lassey, PT, DPT · Last updated August 28, 2026

Sensory processing disorder (SPD) describes difficulty taking in, organizing, and responding to sensory information — from the five external senses plus vestibular (balance and movement), proprioceptive (body position), and interoceptive (internal body state) systems. A person may over-respond to input, under-respond to it, seek it out intensely, or have difficulty telling similar sensations apart. SPD is widely used in occupational therapy practice but is not a standalone diagnosis in the DSM-5 or ICD-11, so it is usually identified through an occupational therapy sensory assessment rather than a psychiatric one. Sensory features appear in both current autism manuals: the DSM-5 added hyper- or hyporeactivity to sensory input in 2013, and ICD-11 followed in 2022.

What are the eight sensory systems?

Most people are taught five senses. Sensory processing frameworks describe eight.

SystemWhat it tells you
Sight, hearing, touch, taste, smellThe external world
VestibularHead position, balance, movement through space
ProprioceptionWhere your body parts are and how much force they're using
InteroceptionWhat's happening inside your body — hunger, thirst, pain, temperature, emotion

The last three are sometimes called the hidden senses, because they operate without conscious attention until something goes wrong. Interoception is the most recently recognized and the least covered in general sensory resources — which is why a child can have a thorough sensory profile that never addresses it.

Explore eachvestibular and proprioceptive processinginteroceptionvisual processingauditory processing

What are the patterns of sensory processing disorder?

Sensory processing difficulties are usually grouped into three patterns, each with subtypes.

Sensory modulation differences — difficulty regulating responses to input:

Sensory discrimination difficulties — difficulty telling similar sensations apart. More on discrimination

Sensory-based motor difficulties — sensory input not supporting movement effectively:

Most people don't fit one box. Mixed profiles are the norm — a child may be over-responsive to sound, under-responsive to pain, and seek movement, all at once.

What are the signs of sensory processing disorder?

Not a checklist. No number of items confirms anything, and every child shows some of these sometimes.

  • Sound — covering ears at ordinary noise, distress at hand dryers or vacuum cleaners; or the reverse, not responding to their name
  • Touch — distress at clothing seams, tags, haircuts, nail cutting, messy play; or not noticing injuries
  • Movement — avoiding swings and climbing, or seeking constant motion, spinning, crashing
  • Body position — bumping into things, using too much or too little force, poor posture, W-sitting
  • Taste and texture — a very narrow range of accepted foods, gagging at textures
  • Light and visuals — distress in bright or busy environments, difficulty finding things in a cluttered space
  • Internal signals — not noticing hunger, thirst, or the need for a bathroom until urgent; difficulty identifying emotions
  • Across all of them — meltdowns after school, difficulty with transitions, exhaustion in busy environments

Relatedsigns in childrenin teensin adults

How does SPD affect daily life?

Sensory processing differences tend to show up in three areas of everyday life, which is often what prompts a family to seek help:

  • Learning. A child spending energy filtering an overwhelming classroom — noise, lights, movement — has less left for focus, so difficulty can look like inattention rather than sensory load.
  • Behavior. Distress from misprocessed input can drive meltdowns, avoidance, or seeking that gets read as misbehavior rather than a response to sensation.
  • Social interaction. Difficulty tolerating or interpreting the sensory side of social settings — busy rooms, unpredictable touch, background noise — can make friendships and group activities harder.

This is also the argument for not waiting: addressing sensory differences early can reduce the secondary costs that build up when a child is repeatedly misread — including low self-esteem and academic struggle.

Is SPD a formal diagnosis?

Not as a standalone condition. SPD does not appear in the DSM-5 or ICD-11 as its own diagnosis3. This is worth understanding, because it has real practical consequences: you generally can't get "an SPD diagnosis" the way you'd get an autism or ADHD diagnosis; what you can get is an occupational therapy sensory assessment, producing a sensory profile and a treatment plan; and insurance coverage is often tied to an associated diagnosis, or to demonstrated functional impairment.

What has changed. Sensory features appear in both current autism manuals: the DSM-5 added hyper- or hyporeactivity to sensory input in 2013, and ICD-11 followed in 2022. Together they are the most significant formal recognition sensory processing has received.

Why the standalone status is debated. Some researchers and clinicians argue the evidence supports SPD as a distinct condition; others hold that sensory differences are better understood as a feature of conditions like autism and ADHD, or as normal variation that becomes disabling in poorly matched environments. Neuroimaging research has found differences in white matter microstructure in children identified with SPD, though those studies involve small samples.4

None of this means the difficulties aren't real. Diagnostic categories are administrative tools. A child who cannot tolerate a school cafeteria has a real problem regardless of which manual recognizes it.

Morehow sensory processing is assessedcauses and risk factors

How common is it?

You will see two numbers quoted for this, around 5% and around 16%. They come from two studies that measured different things, which is why they sit so far apart.

Ahn, Miller, Milberger and McIntosh (2004)1 surveyed parents of kindergarten children. 13% reported significant sensory challenges; adjusted for a 40% response rate, the authors estimated around 5% in a community sample. This is parent-perceived, not clinically confirmed.

Ben-Sasson, Carter and Briggs-Gowan (2009)2 studied a community cohort of elementary-school children (ages 7–11) in Connecticut. Around 16% reported symptoms of sensory over-responsivity — and it commonly occurred in children with no other mental health diagnosis. This measures over-responsivity specifically, not all sensory processing difficulties.

So "5–16% of children have SPD" is an oversimplification of two different measurements. The honest version: somewhere between roughly one in twenty and one in six children experience sensory differences significant enough to affect daily life, depending on how you define and measure it.

How is sensory processing disorder diagnosed?

It is not, in the sense of a diagnostic code — there is no SPD diagnosis in either manual. What happens instead is an occupational therapy assessment: standardized questionnaires completed by parents and teachers, structured observation, and a report describing which sensory systems respond differently and what to do about it. How SPD is assessed covers who does it, what it costs, and what you get at the end.

If you are at the earlier stage of wondering whether any of this applies, the SPD screening quiz takes a few minutes, and the sensory seeking versus avoiding quiz sorts out which pattern you are looking at. Neither returns a diagnosis, and nothing on the internet should.

What helps with sensory processing disorder

Three components, and a good plan uses all three:

Direct therapy — occupational therapy, typically weekly or more often. Ayres Sensory Integration is the approach with the strongest evidence. → Sensory integration therapy and the evidence

Environmental modification — changing the surroundings rather than the child. Thinly studied, but cheap and low-risk, and for an over-responsive child most of the plan.5

Home and school strategies — advance warning before transitions, movement breaks, predictable routines, adjustments to clothing and food. This operates all week rather than for one hour of it.

What has the strongest evidence: deep pressure tactile input, and training caregivers in sensory strategies. Neither requires buying anything.5

What has weak or no evidence: weighted vests and blankets, brushing protocols, and sound therapies have been repeatedly found to have little or no effect on the outcomes claimed.

RelatedFull treatment guidesensory diet strategiesliving with SPDRoom-by-room sensory-friendly home checklist

Sensory processing differences frequently occur alongside other conditions, and rarely in isolation.

Anxiety is the most common of these, and the hardest to separate from a sensory difficulty by watchingis it sensory or is it anxiety?

Autism

Sensory differences are part of the ICD-11 diagnostic criteria, so an autism assessment usually examines them directly.

Learn more →

ADHD

Considerable overlap, and the two are frequently confused for one another.

Learn more →

Monotropism

Offers a mechanism for why attention and sensory overload interact the way they do.

Learn more →

Autistic burnout

Reduced sensory tolerance is one of its three defining features.

Learn more →

Ehlers-Danlos syndrome and other hypermobility conditions co-occur more often than chance. The overlap between ADHD and sensory processing is set out in ADHD vs sensory processing disorder.

Find an occupational therapist near you.

Browse pediatric and adult OT providers by city and state.

Browse the DrSensory Therapy Directory →

More on this topic

Which therapy helps with sensory processing?

What each discipline actually does — assessment, what sessions look like, and what the evidence supports.

Frequently Asked Questions

Is SPD a real diagnosis?

It is widely used in occupational therapy practice and well recognized clinically, but it is not a standalone diagnosis in the DSM-5 or ICD-11. Since 2022, ICD-11 has included sensory processing differences within the autism diagnostic criteria.

Is SPD the same as autism?

No. Sensory differences are common in autistic people and are now part of the autism diagnostic criteria in ICD-11, but sensory processing difficulties also occur in people who are not autistic.

What are the eight senses?

Sight, hearing, touch, taste, and smell, plus vestibular (balance and movement), proprioception (body position), and interoception (internal body state).

What is sensory processing disorder?

Difficulty taking in, organizing, and responding to sensory information from the eight sensory systems. A person may over-respond, under-respond, seek input intensely, or struggle to tell similar sensations apart.

Does sensory processing disorder go away?

Sensory responses often change as children develop, and many people manage well with the right strategies and accommodations. The aim is usually improved daily functioning rather than eliminating sensory differences.

How common is sensory processing disorder?

Estimates range from around 5% to around 16%, but those figures come from two studies measuring different things — parent-perceived difficulties in one, sensory over-responsivity specifically in the other.

Can adults have sensory processing disorder?

Yes. Many adults recognize lifelong sensory differences, often after a child is assessed. Sensory tolerance can also change over time, particularly during periods of stress or autistic burnout.

How does SPD affect my child at school and with friends?

Sensory differences commonly affect three areas: learning (energy spent filtering an overwhelming classroom leaves less for focus), behavior (distress from misprocessed input can look like misbehavior), and social interaction (busy or unpredictable sensory settings make group activities harder). Support that reduces sensory load and builds skills targets exactly these day-to-day impacts.

Find a therapist who works with sensory processing

521 practices in the DrSensory directory name sensory processing or sensory integration among the services they offer — 19 PT, 487 OT, 15 SLP — across 51 states. They are grouped by state below.

Alabama8 practices
Alaska5 practices
Arizona13 practices
Arkansas1 practice
California36 practices
Colorado13 practices
Connecticut5 practices
Delaware4 practices
District of Columbia6 practices
Florida28 practices
Georgia15 practices
Hawaii2 practices
Idaho7 practices
Illinois16 practices
Indiana3 practices
Iowa4 practices
Kansas5 practices
Kentucky7 practices
Louisiana13 practices
Maine6 practices
Maryland12 practices
Massachusetts6 practices
Michigan7 practices
Minnesota6 practices
Mississippi6 practices
Missouri9 practices
Montana7 practices
Nebraska6 practices
Nevada9 practices
New Hampshire5 practices
New Jersey13 practices
New Mexico7 practices
New York15 practices
North Carolina28 practices
North Dakota1 practice
Ohio15 practices
Oklahoma9 practices
Oregon7 practices
Pennsylvania13 practices
Rhode Island6 practices
South Carolina9 practices
South Dakota4 practices
Tennessee15 practices
Texas38 practices
Utah9 practices
Vermont2 practices
Virginia23 practices
Washington18 practices
West Virginia2 practices
Wisconsin7 practices
Wyoming1 practice

Each practice appears here because its own listing names this among what it treats. A listing is not an endorsement or a referral, and inclusion does not mean we have verified a practice’s credentials, licensure or insurance — check those directly. Browse all occupational therapy practices.

Sources

  1. Ahn RR, Miller LJ, Milberger S, McIntosh DN. Prevalence of parents’ perceptions of sensory processing disorders among kindergarten children. American Journal of Occupational Therapy. 2004;58(3):287–293. doi:10.5014/ajot.58.3.287 (PMID 15202626). 13.7% of the children represented were reported as having sensory difficulties; against the full enrollment the conservative estimate was 5.3%.
  2. Ben-Sasson A, Carter AS, Briggs-Gowan MJ. Sensory over-responsivity in elementary school: prevalence and social-emotional correlates. Journal of Abnormal Child Psychology. 2009;37(5):705–716. doi:10.1007/s10802-008-9295-8 (PMID 19153827). In a representative birth-cohort sample, elevated sensory over-responsivity was present in 16.5% of children aged 7–11.
  3. World Health Organization. ICD-11, 6A02 Autism spectrum disorder. Effective January 2022. Sensory features are part of the autism criteria; sensory processing disorder does not appear as a standalone diagnosis.
  4. Owen JP, Marco EJ, Desai S, Fourie E, Harris J, Hill SS, Arnett AB, Mukherjee P. Abnormal white matter microstructure in children with sensory processing disorders. NeuroImage: Clinical. 2013;2:844–853. doi:10.1016/j.nicl.2013.06.009 (PMID 24179836). Diffusion tensor imaging in 16 boys aged 8–11 with SPD and 24 matched controls; reduced fractional anisotropy primarily in posterior white matter.
  5. Piller A, McHugh Conlin J, Glennon TJ, et al. Systematic review of sensory-based interventions for children and youth (2015–2024). Frontiers in Pediatrics. 2025;13:1720179. PMID 41321460. Twenty-one controlled studies. Strong evidence for deep pressure tactile input and for caregiver training in sensory strategies; too few studies to rate environmental modification. doi:10.3389/fped.2025.1720179

Medical disclaimer. This page is for general educational purposes and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your child.