Interoception explained: the sense your child didn't know they had

Most mornings, my daughter sits at the breakfast table and says "I know something is wrong and I don't know what." She can't eat. She can't explain it. What's actually happening is that a full bladder is pressing into her digestive system and making her feel nauseous, but she didn't get the message that she needed the toilet. Once she goes, the feeling passes and she can eat. But she didn't connect the signal to the need; it just arrived as a vague, frightening "something is wrong."

This is interoception. Or rather, this is what happens when interoception isn't working reliably.

I sat down with Jacqui, founder of Kids in Sync and a specialist in sensory integration, to understand what was actually going on. This article is what she explained to me, backed up by what the research says.

What is interoception?

"It's the brain picking up information from the internal organs of the body and sending back messages," Jacqui told me. "Things like heart rate, breathing, whether you feel hungry, whether you need the toilet. All these things we assume happen automatically. You feel the cue, you respond. That's interoception."

Most of us don't think about this process. You feel thirsty, you get a drink. You feel a full bladder, you go to the toilet. The signal arrives, you act on it.

For some children, the system isn't seamless. The signals are there in the body, but the brain either:

• Misses them entirely until they're screaming
• Picks them up late, so urgency seems to come from nowhere
• Picks them up as vague discomfort the child can't identify or act on

Interoception is one of eight sensory systems, alongside the vestibular and proprioceptive systems that most parents haven't heard of.

What interoception difficulties look like in children

These are the everyday patterns parents recognise. You might see one or two, or most of them.

Toileting

• Doesn't realise they need the toilet until it's an emergency
• Has accidents even though they're "old enough to know"
• Seems fine, then suddenly desperate, especially when absorbed in something else
• Morning nausea or discomfort that turns out to be a full bladder

The signal of the bladder filling isn't reaching conscious awareness until the last moment. The child isn't ignoring it; they didn't receive it.

Hunger and thirst

• Won't eat breakfast but is starving by 10am
• Doesn't drink unless reminded; gets headaches from dehydration
• Eats erratically; sometimes too much, sometimes nothing
• Doesn't seem to notice hunger until they're floppy and tearful

Temperature

• Wears a coat in summer without seeming hot
• Refuses a coat when it's freezing
• Doesn't adjust clothing when everyone else does

They may genuinely not be registering the temperature change. This isn't stubbornness.

Pain

• Doesn't notice cuts or bruises
• Over-reacts to minor discomfort in one area but ignores significant pain in another
• Responses don't follow a predictable pattern

The outdated idea that autistic children are "indifferent to pain" is wrong. The research shows varied profiles, not a single pattern.

Sleep

• Can't tell when they're tired
• Still wired at bedtime despite being obviously exhausted
• Difficulty settling because internal arousal cues feel intense or confusing

Emotions

This one matters most and gets its own section below.

Why interoception connects to anxiety and meltdowns in autism

This is where interoception stops being about toileting and starts being about your child's emotional world.

Emotions are partly built from body signals. Your heart races, your stomach tightens, your breathing changes, and your brain labels that package of sensations as "anxiety" or "excitement" or "anger" depending on context. That labelling process depends on interoception.

When interoceptive signals are unreliable, the labelling breaks down. A child can experience a cascade of physical sensations, racing heart, tight chest, churning stomach, without being able to identify what they're feeling or why. The distress is real; the understanding isn't there.

"That's about arousal levels," Jacqui explained. "The brain is trying to regulate all the input coming through, and if it can't, anxiety builds."

About half of autistic people also have alexithymia: difficulty identifying and describing emotions. Research suggests it's alexithymia, rather than autism itself, that drives the interoception-emotion connection. A child isn't "bad at emotions." Their body is sending signals their brain can't decode.

For parents, this explains a pattern you'll probably recognise:

• The meltdown that seems to come from nowhere
• "Something is wrong but I don't know what"
• Fine one moment, overwhelmed the next
• Can't name what they're feeling until they're already flooded

The child isn't going from zero to a hundred. Their body was building towards distress the whole time; they just couldn't read the early signals.

Interoception and autism: what the research says

The research picture is more complicated than most parent websites let on, but the practical takeaway is simple.

Autistic children tend to be less accurate at detecting internal signals like their own heartbeat, but often report being more confident in their ability — the difficulty isn't awareness of the body but accuracy in reading its signals. Findings are mixed: some autistic people show reduced awareness, some show heightened awareness, and many show inconsistency across different body systems. The most accurate description is "different or less reliable" rather than universally poor.

What matters for you as a parent: your child's interoception probably isn't broken across the board. They might notice a tiny temperature change in a room but completely miss that they haven't eaten for six hours. That inconsistency is itself part of the picture, and it's the bit that confuses everyone, child included.

Interoception and ADHD

The ADHD connection is newer but growing. A 2025 review of 18 studies found interoception is often reduced with higher ADHD symptoms, including inattention, hyperactivity, and emotional dysregulation.

The practical version: a child who "forgets" to drink water all day, or "never notices" they need the toilet, or "can't tell" they're getting overheated, may not be forgetful or inattentive in the way we usually mean those words. They may not be receiving the signal. That reframe changes how you support them; you stop relying on the child to notice and start providing the structure externally.

How to support interoception at home

Whether your child's interoception difficulties are linked to autism, ADHD, or both, there are things you can do right now. You don't need to wait for a clinic appointment. OTs call this "external scaffolding": providing from the outside what the child's internal system isn't providing from within.

Notice. Build body check-in moments into the day. "How does your tummy feel right now?" Keep it simple. Don't expect detailed answers at first; you're building the habit of paying attention inward.

Connect. Help link signals to needs.

• "Tight tummy can mean hungry"
• "Wriggly legs can mean you need the loo"
• "Hot face can mean you need a drink"

You're providing the interpretation the child's brain isn't generating automatically.

Respond. Build routines around body needs that don't rely on the child feeling the cue.

• Timed toilet visits rather than "do you need the loo?"
• Water bottle on the table with prompted drinking times rather than "are you thirsty?"
• Snack schedules that don't depend on the child saying they're hungry
• Cool-down routine in warm weather

This isn't treating your child like a baby. It's compensating for unreliable signals while interoceptive skills develop.

Monitor. Track what works.

• Timed toilet visits reduced accidents → that's bladder interoception
• Prompted snacks prevented the afternoon crash → that's hunger interoception
• Body check-in before a transition prevented a meltdown → that's emotional interoception

The data helps you and any professionals understand the pattern.

The simplest change we made was the most effective. I stopped asking "are you thirsty?" (she never is; the signal doesn't come) and started putting a water bottle on the table and saying "time for a drink." The headaches reduced within a week.

Interoception therapy and professional support

Kelly Mahler's Interoception Curriculum is widely used in schools and OT settings. It's a structured programme that teaches children to notice, describe, and respond to internal body signals. Early peer-reviewed results are promising (improvements in emotion regulation and interoceptive awareness), but studies are small and non-randomised, and the developer has declared a financial interest. It's clinically popular and plausible; the rigorous evidence base is still building.

Jacqui's view was that interoception work sits within broader sensory integration therapy. You don't address interoception in isolation; you address the whole sensory profile, because the systems interact. "The two most important things are the internal environment being in balance and the way the brain's processing," she said. "They are the two fundamental things that need to be in place."

For accessing OT in the UK:

• NHS: Referral via GP or school team. Waiting times are often 6-12+ months, sometimes longer. Frame the referral around functional impact ("daily care tasks cause significant distress") rather than asking for "interoception assessment"
• Private: Available faster, roughly £40-80/hr for sessions; full assessments cost several hundred pounds. Private reports don't automatically guarantee NHS provision
• Through school: Request via SENCO; an EHCP can include OT and sensory goals

How interoception fits into sensory integration

Interoception doesn't exist in isolation. It's one piece of a sensory processing system that includes everything from how your child handles noise and touch to how they plan physical tasks.

Jacqui explained this through a developmental triangle: foundational senses (vestibular, proprioceptive, tactile) integrate first, with higher senses, praxis, and academic learning built on top. Interoception underpins the whole structure. If a child's brain is busy coping with sensory overload — a noisy classroom, uncomfortable clothes, flickering lights — there's less processing capacity left for noticing internal signals. The systems compete for bandwidth. This is why interoceptive difficulties often get worse in demanding environments and improve at home.

Understanding this changed how I thought about my daughter's difficulties. The morning dysregulation, the chronic dehydration, the "something is wrong" distress; none of it was behavioural. It was a messaging system that wasn't delivering the messages clearly or quickly enough for her to act on them.

Jacqui is the founder of Kids in Sync, an award-winning children's therapy centre specialising in sensory integration, with clinics in Borehamwood and Twickenham. She is quoted throughout with her permission. This article combines what Jacqui explained to me with independent research; the research summaries are my own.

Don't know where to start? Jacqui offers a one-off parent consultation for £55 where you can talk through your child's difficulties and get advice on what to do next, without committing to a full assessment. Book a parent consultation at Kids in Sync →