Why a warm hug rewires how you feel like yourself

There's a reason a hug from someone you trust can feel like coming home. Researchers are now mapping the exact neural pathway that makes it happen — and the findings suggest warmth does something far more profound than just feel pleasant. It actually changes how connected you feel to your own body.

Dr. Laura Crucianelli, a psychologist at Queen Mary University of London, studies what she calls the "skin-to-brain" signals that shape our sense of self. When warmth touches your skin during a hug, it triggers specialized nerve fibers that send signals directly to the insular cortex — the brain region responsible for interoception, or your internal sense of existing. The result: you feel more grounded, more present, more you.

"Temperature is one of our most ancient senses," Crucianelli explains. "Warmth is one of the earliest signals of protection. We feel it in the womb, in early caregiving, and whenever someone holds us close. It keeps us alive, but it also helps us feel like ourselves."

This matters because altered body awareness is a feature of several mental health conditions — eating disorders, depression, anxiety, trauma-related disorders. People with these conditions often describe a sense of detachment or disconnection from themselves, as if they're observing their body from the outside rather than inhabiting it. Clinical evidence suggests that disruptions in thermal perception may accompany these disturbances in body ownership.

The warmth effect

When you hug someone, the combination of touch and warmth increases your sense of body ownership. That warm contact engages the same neural pathways that trigger oxytocin release — the hormone associated with safety and social bonding. Your physiological stress markers drop. The boundary between "self" and "other" temporarily dissolves. You feel, as Crucianelli puts it, "connected, valued, and part of a social world."

It's not just poetic. The neurobiology is real. Warm interpersonal contact activates interoceptive signaling networks that enhance your ability to sense yourself from the inside and recognize your own existence.

Beyond the hug, these findings have practical implications. Understanding how thermal signals shape body awareness could improve rehabilitation for stroke patients, inform the design of prosthetics that feel more natural to users, and guide new sensory-based interventions for mental health conditions where people feel disconnected from their bodies.

There's also a larger context: as global temperatures shift with climate change, understanding how warmth and cold shape our relationship with ourselves may help explain why extreme temperature exposure affects not just physical health but mood, stress, and bodily awareness in everyday life.

For now, the research confirms something you already knew. A warm hug isn't just nice. It's a reminder that you're real, you're here, and you're held.