Interoception: The Sense That Tells You What Your Body Is Doing

Somebody asks how you are feeling and you genuinely do not know. Not in an evasive way. You check, and the reading comes back blank, or it comes back as a vague physical unease that refuses to resolve into a word.

Or the opposite: you feel your heart in your chest constantly, you notice every skipped beat, and each one arrives with a small charge of alarm.

Both of these are interoception, working differently.

Interoception is the sense of your own internal bodily state: heart rate, breathing, gut activity, temperature, hunger, the muscular tightening that arrives before you have a name for the emotion. It is a sense in the same way vision is a sense, it varies enormously between people, and it is one of the more useful concepts in psychology that almost nobody outside the field has heard of.

Why this is not just "being in tune with your body"

Because the research splits it into components that come apart, and the coming apart is where all the interesting findings are.

The framework most commonly used, developed by Sarah Garfinkel, Hugo Critchley and colleagues, distinguishes three things:

Interoceptive accuracy. How well you objectively detect internal signals. Typically measured with a heartbeat counting or heartbeat detection task: can you count your own heartbeats, without taking a pulse, and does your count match the monitor?

Interoceptive sensibility. How good you believe you are, and how much attention you pay. Measured by questionnaire.

Interoceptive awareness. The correspondence between the first two. Do you know when you are right? Is your confidence calibrated?

The reason this three-way split matters is that accuracy and sensibility correlate far less than you would expect. Plenty of people are confident they are exquisitely attuned to their bodies and cannot count their own heartbeats. Plenty of people who report feeling disconnected from their bodies perform well on the objective task.

That gap has a name, prediction error, and it is where a lot of the clinical action is.

What interoception is doing in emotion

The reason this concept keeps appearing in anxiety and depression research is that emotions are substantially built out of bodily signals.

You do not first feel afraid and then notice your heart racing. Something in the environment triggers a cascade, your body changes, your brain reads that change against context, and the labelled experience of fear is the output. This is the modern descendant of a very old idea in psychology, and the details are contested, but the general shape is not: interoceptive signals are ingredients in emotion, not consequences of it.

Which means the quality of the signal matters for the quality of the emotional experience.

Where the signal is weak or hard to read, emotions arrive as undifferentiated static. You know something is wrong and you cannot say what. This connects to alexithymia, the trait of difficulty identifying and describing your own feelings, which shows a consistent association with poorer interoceptive accuracy. If naming feelings is difficult for you, part of the difficulty may be upstream of the words, in the reading rather than the vocabulary.

Where the signal is over-read, ordinary bodily noise gets interpreted as threat. A racing heart in a person prone to panic is not just noticed, it is read as evidence that something terrible is happening, which produces more arousal, which produces a louder signal. This loop is one of the better-understood mechanisms in panic disorder, and it is why interoceptive exposure, deliberately inducing the sensations in a controlled setting, is part of some CBT protocols for panic.

Where the signal is miscalibrated, which is the prediction-error case, you get high confidence in inaccurate readings. This pattern, high sensibility with low accuracy, has been associated with anxiety in several studies, and it makes intuitive sense: certainty about a body signal you are actually misreading is a good recipe for alarm.

Where else this shows up

Eating disorders. Interoceptive difficulties, particularly around hunger and satiety, appear consistently in anorexia nervosa research, and are one of the reasons "just listen to your body's cues" is unhelpful advice for someone whose cue-reading is the disrupted part.

Autism. Findings here are mixed and frequently overstated in popular coverage. There is evidence for altered interoceptive processing in some autistic people, and there is also significant overlap with alexithymia, which occurs at higher rates in autistic populations and may account for a good deal of the association. Be sceptical of anyone stating this simply.

Chronic pain and fatigue conditions. An active research area, where the interesting questions are about how internal signals get weighted and predicted rather than about whether the signals are real.

Ordinary emotional life. The unglamorous and most common case: knowing you are angry before you have said something you regret, noticing tiredness before it becomes a crash, catching the tightening at the start of an anxious spiral rather than at minute forty.

Can you improve it?

Cautiously, yes, with two honest caveats: the evidence base is younger than the enthusiasm, and more is not automatically better.

On the second caveat first, because it gets skipped. If your problem is over-reading bodily signals, training yourself to pay more attention to bodily signals is not obviously a good idea and may make things worse. Someone in a panic cycle who starts monitoring their heart rate more closely is adding fuel. The goal is calibration, not amplification. That distinction is also why sleep trackers can backfire so badly: a device that trains you to check a number before you check how you feel is amplifying attention, not calibrating it.

Within that, the approaches with support:

Body scan practice. Systematic attention through the body, without trying to change anything. The point is the noticing, and the tolerating of what you notice.

Slow-exhale breathing. Breath is the most accessible interoceptive channel and one you can voluntarily modulate, which makes it the natural place to start. The physiological sigh, two inhales through the nose and a long exhale through the mouth, has the best trial evidence of the specific techniques, and it is practice one in the ILTY Toolkit.

Naming what you find, precisely. Interoception delivers a raw signal; emotional granularity turns it into a usable label. The two work together, and precision in labelling is itself associated with better regulation.

Movement with attention. Yoga, tai chi, or any exercise where the point includes noticing what the body is doing rather than only what it is producing. Endurance athletes are an interesting case here: many are excellent at reading effort and poor at reading fatigue, having spent years training themselves to override exactly that signal. We wrote about the cost of that in overtraining and mood.

Mindfulness, with a caveat. It helps some people and unsettles others, particularly people with trauma histories, for whom turning attention inward can be destabilising rather than calming. This is a real effect, not a rare one, and it is worth knowing before you are told to try harder.

What this is useful for

The practical value is a reframe.

If you have concluded you are emotionally shallow because you cannot answer "how do you feel", interoception offers a different account: the reading may be genuinely faint, or genuinely hard to interpret, and that is a perceptual difference rather than a character one. It is also somewhat trainable, which "being out of touch with your feelings" is not, because it is not a description of anything you could work on.

And if you have concluded that you are excessively sensitive because you notice everything your body does, the same framework says the issue may not be that you feel too much, but that your interpretation layer is running hot. That is a different problem, with a better-understood set of responses.

Frequently asked questions

What is interoception in simple terms? The sense of your own internal body state. Heartbeat, breathing, hunger, thirst, temperature, gut sensation, and the physical components of emotion. It sits alongside the external senses and proprioception, which tells you where your limbs are.

How is interoception measured? Most commonly with heartbeat detection or heartbeat counting tasks for accuracy, and questionnaires such as the MAIA for sensibility. The gap between the two, awareness, is often the most informative measure and the one popular coverage ignores.

Is poor interoception a disorder? No. It is a dimension people vary on, like visual acuity. Difficulties are associated with several conditions, including anxiety disorders, alexithymia and eating disorders, but low accuracy on its own is not a diagnosis and does not require treatment.

Is interoception the same as alexithymia? No. Interoception is the perception of bodily signals; alexithymia is difficulty identifying and describing emotions. They are correlated and conceptually adjacent, and one plausible reading is that some alexithymia is downstream of weaker interoceptive signal.

Can improving interoception reduce anxiety? Sometimes, and not reliably, and the direction matters. Better calibration helps. Simply paying more attention to bodily sensations can make anxiety worse if over-reading is your pattern. If you have panic symptoms, interoceptive work is best done with a clinician rather than solo.

---

Sources and further reading

• Garfinkel SN, Seth AK, Barrett AB, Suzuki K, Critchley HD (2015). "Knowing your own heart: distinguishing interoceptive accuracy from interoceptive awareness." Biological Psychology
• Khalsa SS et al. (2018). "Interoception and Mental Health: A Roadmap." Biological Psychiatry: CNNI
• Mehling WE et al. (2012). "The Multidimensional Assessment of Interoceptive Awareness (MAIA)." PLoS ONE
• NIMH — Anxiety Disorders

Curated authoritative references. ILTY is a mental-health support tool, not a substitute for professional care. If you are in crisis, call or text 988.

---

ILTY will not ask you to rate your feelings out of ten. Our companions work in the other direction: describe what is actually happening, physically and situationally, and let the name arrive from there. For a lot of people that is a considerably easier starting point than being asked how they feel.

Download ILTY and start from what your body is doing.