Why might anyone want to learn how to cool down using psychology? … Here in the UK, we are having our 4th official heatwave of the Summer. Summer heat can be tough to cope with if you are not used to dealing with it. When air conditioning isn’t available, many of us instinctively reach for physical cooling methods — fans, cold water, wet cloths, ice packs. Those all can work well.

Today, I’d like to share there’s a surprising and useful other tool that can also help: the brain. There is a growing body of research which shows that mental techniques — imagery, suggestion, breathing, attention and simple cognitive reframes — can change how hot we feel, alter blood flow to the skin, and in some cases shift peripheral or even core temperature measurably. You really can cool down using psychology. I thought that I’d summarise the science behind those effects and offer up some practical, step-by-step psychological tools that anyone can use when you need to cool down fast (or cope better in sustained heat). All guidance offered up here today is evidence-based and — crucially — realistic about what the mind can and cannot do.

“In a study of meditative practitioners, investigators found that during certain practices fingers and toes could increase in temperature by many degrees — clear evidence that the brain can change peripheral thermoregulation.”
– van Hoof J., et al. (2025)

Quick overview: what the brain controls in thermoregulation

What are the mechanisms that enable us to cool down using psychology? Your body’s temperature is regulated by the nervous system. The hypothalamus integrates sensory inputs (skin temperature, core sensors) and adjusts effectors: sweating, blood flow to the skin (vasodilation or vasoconstriction), shivering, and behaviour (seek shade, drink). Behavioural cooling (finding shade, removing layers) is the fastest and most reliable. But the brain also modulates autonomic responses — and that’s where psychology comes in. Mental states and cognitive strategies can influence:

a) Peripheral blood flow and skin temperature (hands, feet, face) — through changes in vasodilation/vasoconstriction. Several experiments show mental imagery and hypnotic suggestion can change finger temperature.

b) Perceived thermal comfort — how warm or cool you feel, even when objective temperature is unchanged. Visual cues, expectations and cognitive appraisals powerfully influence this.

c) Autonomic arousal (sympathetic/parasympathetic balance) — slower breathing and relaxation reduce sympathetic activity (which can otherwise raise skin blood flow and sweating patterns) and lower subjective heat stress.

Important caveat: psychological tools often more reliably change perception and peripheral measures than core body temperature in healthy people in hot environments. Where core temperature shifts have been reported (notably g-tummo meditation), the methods are specialised and combine breathing with imagery and years of practice; those are not quick fixes for heatwaves. Still, for everyday coping, mental techniques can make a big, practical difference to comfort and safety when used alongside physical measures.

The mechanisms: how thinking changes heat

Researchers describe several mechanisms by which psychological activity influences thermal state and sensation (how we cool down using psychology):

a) Top-down modulation of autonomic output. Thoughts, imagery and suggestion can change sympathetic and parasympathetic balance, altering vasomotor tone and sweating. Hypnosis and guided imagery studies show such changes in skin perfusion and temperature.

b) Mental imagery affecting blood flow. Imagining warmth or cold can bias local blood flow through learned associations (e.g. imagining cold compresses leads to vasoconstriction). Studies measuring finger temperature during directed imagery support this.

c) Altering perception via multisensory cues. Visual colour, lighting, sounds and contextual cues shift how warm we feel (the so-called hue-heat effect and related multisensory effects). That’s why a room lit with cooler-looking lights or showing images of ice can feel subjectively cooler.

d) Changing appraisal and perceived control. If you think you can influence the environment (e.g. you have a fan, ice, or ways to cool), your tolerance and reported comfort improve. Perceived control reduces subjective heat stress.

e) Attention and distraction. Attention away from bodily heat sensations (distraction) reduces perceived discomfort and can lower physiological stress responses.

Evidence-backed psychological tools to cool down using psychology

Below are practical techniques, each with the scientific rationale and how to do them. Use them in combination with physical cooling (drink water, shade, fans), especially during extreme heat.

1. Guided imagery of coolness (simple, effective, and quick)
What it does: Directed mental imagery of cold objects or environments (e.g. Arctic lake, ice cube on the wrist, cool breeze) has been shown to change skin blood flow and reported thermal sensation. Imagery can trigger vasoconstriction in some contexts and reduce the subjective feeling of heat.

How to do it (2–5 minutes):
Sit or lie comfortably and close your eyes.
Take three slow, deep breaths.
Picture a clear, detailed image of something very cold — for instance, an ice cube melting in your palm, a glacier, or walking beside a cool stream. Include sensory details: the minty sharpness, the sound of crunching ice, the coolness against your skin.
Focus on the feeling in a local spot — wrists, neck, face — and mentally “apply” the cold there. Imagine blood vessels tightening and a pleasant cooling spreading outward.
Keep the imagery steady for 1–3 minutes and breathe naturally. Open your eyes and notice any change in perceived temperature.

Notes: Guided scripts and brief hypnotic suggestions used in lab settings have produced measurable skin temperature changes (often in fingers) and reliable reductions in reported warmth. Expect subjective relief; peripheral temperature changes may be modest but are repeatable.

2. Self-hypnosis or thermal suggestion
What it does: Hypnotic suggestion for cold sensations has been used in experiments to lower local skin temperature (hands) and change thermal perception. For many people, a brief self-hypnosis routine amplifies the effect of imagery.

How to do it (5–10 minutes):
Find a quiet spot. Get into a comfortable posture.
Induce hypnosis. If you don’t know how to do this, learn more at this page of my college website: Learn Self-Hypnosis Here.
Say a clear cooling suggestion to yourself (mentally or out loud): e.g. “My hands are becoming pleasantly cool and relaxed; a refreshing coolness spreads from my wrists to my fingers.” Repeat slowly.
Continue the imagery of cool water or air while deepening the focus. Make it as believable as possible.
End with a cue (e.g. “On three, I will open my eyes and feel refreshed and cooler.”)

Evidence: Multiple studies from the 1970s–2000s report local vasoconstriction and skin temperature shifts after thermal suggestion; though effects vary with hypnotic susceptibility, many people report meaningful comfort benefits.
If you’d like a more robust step-by-tep process for using self-hypnosis to lower body temperature, read this article: Using Self-Hypnosis to Lower Your Body Temperature.

3. Slow diaphragmatic breathing and sitali/sitkari (breathing for coolness)
What it does: Slow, controlled breathing reduces sympathetic arousal (stress) and can influence peripheral circulation and subjective sensations. Traditional yogic breaths like sitali (inhaling through a rolled tongue or pursed lips) are specifically described as cooling. Controlled slow breathing has robust evidence for lowering physiological arousal, which helps with thermal comfort.

How to do it (3–10 minutes):
Basic slow breathing: Inhale for 4–5 seconds, exhale for 6–7 seconds. Repeat for 3–10 minutes. Keep breaths smooth and unforced.
Sitali (cooling breath): Curl the tongue into a tube (if you can) and inhale through the mouth for 3–4 seconds; exhale through the nose. If you can’t curl your tongue, do sitkari — inhale through slightly parted teeth with lips closed, like sipping air through a straw.
Notice the cool air entering the mouth and throat; imagine it spreading through your chest and limbs.

Evidence: Systematic reviews show slow breathing improves heart-rate variability and reduces anxiety and subjective stress; in heat this lowers perceived arousal and can make you feel cooler and more composed. Specific studies describe reduced subjective heat and some changes in skin temperature during breathing interventions.

4. Biofeedback training (finger temperature feedback)
What it does: Temperature biofeedback uses real-time feedback devices to teach you to raise or lower skin temperature (usually in a finger). After 10–20 sessions many people can voluntarily change peripheral temperature, which helps with circulation and comfort (used clinically for Raynaud’s and stress).
SpringerLink
biofeedbackinternational.com
How to access it:

Clinics and trained biofeedback practitioners offer programmes.
Consumer devices (finger sensors paired with smartphone apps) allow home practice.
Typical course: 10–20 short sessions (15–30 minutes) learning to increase or decrease finger temperature using relaxation and imagery.

Evidence: Research shows that learned control over finger temperature is possible and mediated by physiological mechanisms (including β-adrenergic pathways) and can translate to reduced subjective distress in heat contexts.

5. Cognitive reappraisal and perceived control (change your story about the heat)
What it does: Reappraising the situation — e.g. “I can cope” or “this is a bearable, temporary heat” — reduces stress and improves comfort. Studies show that an individual’s appraisal of thermal situations influences reported sensation and behavioural tolerance. Perceived control (even small control like a handheld fan or a window that opens) greatly improves comfort.

How to practise (instant reframe):
Name the thought: “I’m too hot, this is unbearable.”
Reappraise: “This is hot, but I’m safe; I’ve managed heat before; I can use simple steps now.”
Add action cues: “I’ll take three slow breaths, splash cool water on my face, and put a cool cloth on my neck.”
Use short, repeated affirmations: “I can lower my temperature; I have options.”

Evidence: Experiments manipulating appraisal show direct effects on reported thermal sensation. Interventions that increase perceived control (e.g. giving people simple controls over ventilation or cooling) reduce perceived heat stress and can even reduce cooling energy use in buildings.

6. Visual and multisensory cues (use “cooling” sensory inputs)
What it does: Colours, images, and sounds associated with cool environments can reduce perceived temperature. The “hue-heat” literature shows consistent effects: blue/green visual contexts and images of water or snow make rooms feel subjectively cooler (even if the thermometer is unchanged).

How to use it:
Put up images of water, ice, glaciers or blue-toned scenes on your phone or desktop.
Use cooler-appearing lighting if possible (higher correlated colour temperature / bluer white light) in warm conditions.
Play audio of water, wind or other “cool” soundscapes while doing imagery.

Evidence & limitations: Recent studies confirm multisensory manipulations affect comfort but effects vary across individuals and contexts; still, they are low-cost and can be helpful when combined with other techniques.

7. Attention and distraction techniques
What it does: Focusing attention away from bodily heat (for instance onto a pleasant cognitive task, music, or conversation) reduces the subjective experience of heat and associated stress responses. Occupational studies show distraction moderates how heat affects performance and reported discomfort.

How to practise:
Engage in a low-effort task: listen to a podcast, play a simple game, or follow a guided meditation that does not emphasise body sensations.
Use tasks that require sustained attention but aren’t physically demanding.

Evidence: Distraction is a well-established psychological tool for reducing perceived discomfort across many modalities, including heat. It’s cheap and fast to apply.

Practical cooling protocol — 6 minutes to calmer, cooler

Combine techniques into a quick routine you can do anywhere:
Immediate fix (0–30 secs): Splash cool water on face/wrists and loosen clothing. Seek shade or a breeze if possible.
Breathing reset (30–90 secs): 2 minutes of diaphragmatic slow breathing (inhale 4–5 s, exhale 6–7 s).
Imagery + suggestion (90 secs–4 mins): Close eyes, visualise a cool stream or ice cube placed on your wrists/neck; mentally suggest “cool spreads from the neck down”.
Sensory cue (4–6 mins): Open eyes to a blue image, or play water sounds; repeat a short reappraisal and action cue (e.g. “I can cope; I’ll stay hydrated”).
Follow-up: Drink cool (not icy) water, reapply cool cloths, and pace activity.

This blend targets autonomic arousal (breathing), perceived temperature (imagery, visuals), and practical cooling actions for best effect.

Safety and limits — when to seek help

Psychological cooling is a complement, not a substitute for medical interventions in heat illness. If someone shows signs of heat stroke — confusion, collapse, very high body temperature, vomiting, or loss of consciousness — call emergency services and cool them physically (ice packs, immersion if trained). Psychological techniques are for comfort, coping and modest physiological shifts; they will not replace rehydration, shade, or medical care.

How effective are these methods, really?
Perception: Very effective. Psychological tools reliably change how hot people feel, which matters enormously for comfort and performance. Studies of visual cues, appraisal manipulations and breathing report measurable and reproducible changes in thermal sensation.

Peripheral skin temperature: Modest but measurable. Imagery, suggestion and biofeedback reliably change finger and hand temperature in many experiments; some people learn robust control through training.

Core temperature: Difficult to change in untrained people; elite meditative practices (e.g. g-tummo) have produced core increases, indicating the brain can, in principle, alter core thermoregulation — but this requires specialised practice and often involves vigorous breathing components. For cooling core body temperature in heat illness, physical interventions remain essential.

Practical tips: what to engage with first

If you’re suddenly overheated: Cool water on wrists/face + 2 minutes of slow breathing + 1–2 minutes of cool imagery.
If you’re stuck at work without AC: Adjust lighting/screens to cooler hues, display water imagery on your monitor, practise the 6-minute protocol when you can.
If heat is a recurring problem for you: Consider a short course of temperature biofeedback (if available) or learn a self-hypnosis/imagery process to use reliably.
Be responsible: If you wish to cool down using psychology, it really needs to be part of a plan that includes hydration, behavioural cooling, and medical attention when needed.

Your mind is a practical tool for coping with heat. You can cool down using psychology. While it won’t replace fans, shade or fluids, carefully applied psychological techniques can reduce discomfort, modestly shift peripheral physiology and improve your ability to tolerate warm conditions. As I said, you can cool down using psychology. They’re cheap, safe, and portable — and for many people they’re surprisingly effective.

Have some of themes here resonated with you? Then have a read of these pages:
Would you like a satisfying and meaningful career as a hypnotherapist helping others? Are you a hypnotherapist looking for stimulating and career enhancing continued professional development and advanced studies? Adam Eason’s Anglo European training college.

References

Benson H, et al. Body temperature changes during the practice of g-tummo yoga. Nature. 1981. — Early experimental observations showing meditative control of peripheral temperature.
Nature
Kozhevnikov M, et al. Neurocognitive and Somatic Components of Temperature Increases in Meditative Practices. PLoS ONE / related reviews. — on meditative increases in core/peripheral temperature and mechanisms.
PMC
Crawford H, et al. The effect of thermal suggestion on skin temperature under hypnosis. (study summary). — experimental evidence that hypnotic cold suggestions can lower hand temperature.
edusoft.ro
Critchley HD, et al. Cognitive appraisals and embodiment of thermal sensation. (review & experiments) — demonstrates that cognitive reappraisal influences thermal comfort and sensation.
PMC
Kuijsters A., et al. Effects of correlated colour temperature of light on thermal comfort. Building and Environment. 2023. — on hue-heat and how lighting affects perceived temperature.
Eindhoven Tech Research Portal
Lehrer P., et al. Physiological mechanisms of temperature biofeedback. Applied Psychophysiology & Biofeedback. — review of mechanisms and evidence for finger temperature biofeedback.
SpringerLink
Brown R. & Gerbarg P. Physiological effects of slow breathing in the healthy human. Frontiers / PMC review. — systematic review of autonomic effects of slow breathing relevant to thermal comfort.
PMC
van Hoof J., et al. Perceived control and thermal response; perceived control mitigates thermal discomfort and energy use. Scientific Reports (2025). — perceived control reduces thermal stress and changes behaviour.
Nature
Schulte-Baumbach P., et al. Investigating the validity of the hue-heat effect on thermal sensitivity. Scientific Reports (2024). — recent experimental work on colour and temperature perception.
Nature
Lancet Commission / reviews on managing heat and health (recommendations for physical cooling and safety).