Interoception is the sensory system that gets the least attention relative to how much it shapes daily AuDHD life, and the gap between how much it matters and how much it’s discussed in practical terms is producing a lot of unnecessary confusion about why AuDHD people struggle with things that seem like they should be simple.

Interoception is the sensory system that provides information about the body’s internal states: hunger, thirst, fatigue, pain, temperature, heart rate, bladder fullness, and the physical dimension of emotional states. It’s the system that’s supposed to tell you when you need to eat, when you need to rest, when something in your body requires attention. In neurotypical nervous systems it operates largely in the background, producing reliable signals that get translated into the felt experience of need and then into the behavior that addresses it. You get hungry, you notice you’re hungry, you eat.

In autistic and AuDHD nervous systems, interoception often works differently. The signals may be less clear, less consistent, delayed, or processed in ways that don’t reliably produce the felt experience of need. The hunger that doesn’t register until it’s affecting cognitive function. The fatigue that isn’t felt until it’s already become depletion. The pain that doesn’t register at its actual severity, producing the clinical presentation that confuses doctors because the person seems calm about something that should hurt. The emotional activation that’s happening in the body but that isn’t reaching conscious awareness as a labeled emotion, which is part of what alexithymia actually is: not the absence of emotional experience but the disruption of the pathway from the body’s emotional experience to its conscious recognition.

The practical consequences run through almost everything. Irregular eating patterns that look like poor self-care and are actually the natural result of not receiving reliable hunger signals. Late identification of illness because the body’s distress signals aren’t arriving clearly. Difficulty with emotional regulation that isn’t really about regulation at all but about not having reliable access to what’s being felt until it’s already escalated past the point where early intervention would have helped. Burnout that arrives apparently suddenly because the fatigue that was building didn’t register as fatigue until the system was already depleted.

Understanding interoception changes what support looks like. External check-ins, scheduled prompts to ask the body what it needs rather than waiting to feel the need, aren’t compensatory strategies for poor self-care. They’re the appropriate accommodation for a sensory system that doesn’t deliver its information on a reliable schedule.​​​​​​​​​​​​​​​​