Interoception is your sense of your body's internal state: signals like heartbeat, breathing, hunger, temperature, and muscle tension. It's how you know you're thirsty, nervous, or full. Researchers see it as closely tied to emotion, much of what we call a feeling is the body's internal signals reaching awareness.
Interoception is the perception of signals from inside the body, the internal sense that runs alongside sight, hearing, touch, and balance.
It covers the felt state of the heart, lungs, gut, bladder, muscles, and temperature. Most of it runs quietly in the background. You notice it when a signal grows strong enough: a pounding heart, a dry throat, a knot in the stomach, the urge to breathe. It's the channel that keeps the brain informed about how things are inside.
Interoception sits close to emotion.
Reviews of the field describe our felt emotions as bound up with the body's internal signals: a racing heart and tight chest are part of what fear feels like, not just its side effects (Critchley and Garfinkel). This is why naming a bodily sensation, a tight jaw, a heavy chest, can be a first step toward naming the feeling behind it. It also links to everyday things like decision-making and how attuned you feel to your own needs.
Here's the honest part: how well you sense your inner state and how accurate that sense actually is are two different things.
People who report being very body-aware don't always score higher on objective measures, like counting their own heartbeats (Clemente and colleagues). Self-reported interoception tends to track with things like anxiety, while measured accuracy often doesn't. In plain terms: your read on your body is real, useful information, but it's a reading to reflect on, not a precise instrument.
You can practice paying closer attention to internal signals.
Body scans, slow breathing, and simple check-ins (pausing to ask “what do I notice right now?”) all keep attention on internal sensation, which is how the skill develops. The aim isn't to become a perfect sensor; it's to notice sooner and with less judgment. If you'd like a structured starting point, Felti's 2-minute quiz maps where you tend to hold stress in the body to a likely emotional driver, a small exercise in interoceptive noticing.
Interoception is your sense of what's happening inside your body: signals like heartbeat, breathing, hunger, temperature, and tension. It's how you know you're thirsty or nervous. It runs in the background until a signal gets strong enough to notice.
Feeling your heart pound before a presentation, noticing hunger, sensing a full bladder, or feeling a tight chest when you're on edge. Each is an internal body signal reaching awareness, which is interoception at work.
It's sometimes called that, but interoception is a specific scientific term for sensing the body's internal state. It sits alongside the external senses and the sense of balance, not anything supernatural.
Research links the two closely: the body's internal signals are part of what an emotion feels like. A racing heart and tight stomach aren't just effects of fear, they're part of the experience itself (Critchley and Garfinkel).
You can practice attending to internal signals through body scans, slow breathing, and brief check-ins. The goal is to notice sooner and more clearly, not to become perfectly accurate, since felt awareness and measured accuracy don't always match.