The Science Behind Holding a Warm Mug

I can’t tell you how many conversations I’ve had with other moms about reheating the same cup of coffee three times.

We laugh about it because it’s almost a rite of passage. You pour it. Someone needs you. You microwave it. Someone needs you again.

But somewhere in those conversations, another observation always comes up. There’s something about finally wrapping your hands around that warm mug while your children are happily playing nearby. A mom friend called it her “emotional support mug.” That's when I noticed it isn’t really about the coffee anymore. It’s something else. I started wondering why.

We usually explain moments like this psychologically. Maybe it’s finally sitting down. Maybe it’s the quiet. Maybe it’s the first uninterrupted moment you’ve had all day.

Those things probably matter. However, emerging neuroscience suggests there may be another piece of the story that most of us have never considered.

It starts with something as ordinary as temperature.

More Than Just Feeling Warm

Temperature doesn’t just tell your brain whether something is hot or cold. It also tells your brain something about you.

Researchers who study interoception, the brain’s ability to sense what’s happening inside the body, are beginning to think temperature plays a bigger role than we once realized. It may even contribute to something called body ownership. That’s the quiet, mostly unconscious feeling that this body belongs to you.

Most of us never notice it because it’s always there. Researchers only began to appreciate its role when they found ways to temporarily disrupt it.

One of the best-known experiments uses a realistic rubber hand. Participants watch the fake hand being stroked while their real hand, hidden from view, is stroked at the same time. Surprisingly, many begin to experience the rubber hand as part of their own body. Then researchers changed one small detail.

The temperature.

When what participants saw no longer matched what they felt, the illusion became weaker. Temperature appeared to be one of the signals the brain was using to decide what belonged to the body and what didn’t.

Researchers aren’t suggesting that holding a warm mug changes body ownership in the same way. But studies like these point toward something fascinating. Temperature may be one of the many signals the brain uses to maintain a clear sense of the body.

This story doesn’t end in the laboratory. A 2025 review on thermosensation described temperature as one of the oldest senses we have, tracing all the way back to warmth felt in the womb and in early caregiving. The same review noted that disruptions in how people process temperature show up more often in conditions where people also struggle to feel connected to their own bodies, including depression, trauma, and recovery after a stroke. None of that means a warm mug is treating anything. It just means the signal you’re feeling in your hands runs deeper than most of us assume.

Why This Matters

Think about how often warmth shows up in moments that feel comforting.

A hot shower after a difficult day.

A bowl of soup when you’re sick.

A blanket fresh out of the dryer.

Wrapping both hands around a mug while the house is finally quiet.

We tend to think of those moments as comforting because of what they mean. The research raises another possibility. They may also feel comforting because of what they’re asking your brain to notice. It may be doing more than making us comfortable. It may also be giving the brain a clear sensory signal that helps us feel more present in our bodies.

Reading this research made me wonder about the bigger version of the same idea. Why are so many people drawn to infrared saunas, cold plunges, and ice baths? Perhaps part of the appeal isn’t just dopamine or willpower. It could be something simpler. A jolt of heat or cold that pulls you out of your head and back into your body, if only for a few minutes.

Heat and cold aren’t doing the same thing to your body. In some ways they’re opposites. But when it comes to this particular effect, the direction may matter less than you’d think. What both extremes have in common is that they’re impossible to ignore. A strong, unmistakable temperature signal may give your brain something clear to organize around, whether that signal is a hot mug or an ice bath. Most of the day, your body runs on a kind of background hum you barely register. Heat and cold both cut through that hum. They just do it from opposite directions.

For anyone who spends most of the day caught up in thoughts, stress, or the constant demands of caring for other people, that small shift can feel surprisingly significant.

A Small Experiment

The next time you notice yourself feeling stressed, overwhelmed, or disconnected, pay attention to temperature. It could be the warmth of a mug, a hot shower after a long day, cool water on your face, or even the cool side of the pillow. Spend ten seconds noticing the sensation instead of letting it pass by unnoticed.

Where do you feel it first? Does it stay in one place or spread? Do you notice yourself becoming a little more aware of your body than you were a moment ago?

It’s a small habit, but it asks you to pay attention to one of the oldest sensory signals your brain receives.

Researchers are still learning exactly how temperature contributes to our experience of the body. So the next time you find yourself reheating that same cup of coffee for the third time, don’t rush through the first sip. Wrap both hands around the mug and take a moment to really notice the warmth. You might find that your brain was paying attention to something much more important all along.

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If this resonated with you, I’d genuinely love to know what stayed with you most. Feel free to leave a comment or subscribe if you’d like future posts delivered to your inbox.

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References

Filippetti, M. L., et al. (2025). From Feeling Chilly to Burning Up: How Thermal Signals Shape the Physiological State of the Body and Impact Physical, Emotional, and Social Well-Being. Neuroscience & Biobehavioral Reviews.

Tieri, G., et al. (2022). Visuo-Thermal Congruency Modulates the Sense of Body Ownership. Communications Biology.

Further Reading

Crucianelli, L., et al. (2025). Shaping Bodily Self-Awareness Through Thermosensory Signals. Trends in Cognitive Sciences.