Heat (热 Rè) is a fundamental pathogenic factor in Traditional Chinese Medicine, internal or external, that consumes organic fluids, agitates Blood and Shen, and causes inflammation, fever, redness and agitation.
Heat
热
- Consumes organic fluids and dries tissues
- Agitates Blood and causes bleeding
- Disturbs Shen and engenders agitation and insomnia
- May be external (acute fever) or internal (empty Heat)
- Requires cool, refreshing and hydrating foods
Heat is a Yang factor that rises, consumes and agitates. Like fire, it devours fluids, reddens the skin, accelerates processes and may cause lesions if it becomes excessive or persistent.
In Traditional Chinese Medicine
In TCM theory, Heat is a pathogenic factor that can be external (climatic attack: summer heat, infectious fever) or internal (Qi stagnation that transforms into Fire, Yin deficiency that leaves Yang relatively excessive, overly hot and drying diet, repressed emotions that produce Fire). Heat is characterised by its rising, active and consuming nature.
External Heat (perverse) penetrates through the body surface (skin, mouth, nose) and causes acute syndromes: high fever, intense thirst, sweating, rapid pulse, red tongue with yellow coating. It may transform into internal Heat if it penetrates more deeply.
Internal Heat (endogenous) manifests with chronic signs: hot flushes, evening fever, dry throat, insomnia with agitation, red tongue without coating or with dry yellow coating, rapid and thin pulse. It may result from:
- Heart Fire: agitation, insomnia, mouth ulcers, thirst, red tongue
- Liver Fire: migraines, irritability, red eyes, dizziness, red tongue with yellow coating
- Stomach Fire: intense thirst, excessive appetite, inflamed gums, red tongue with thick yellow coating
- Lung Heat: dry cough, irritated throat, yellow phlegm, thirst, moderate fever
- Dampness-Heat: sensation of heat and heaviness, urinary infections, red and wet eczema, red tongue with yellow, greasy coating
Practical Applications
In Chinese dietary therapy, Heat is treated with foods of cool or cold nature, rich in fluids and nutrients, that cool, hydrate and calm. Foods that clear Heat include cucumber, courgette, melon, watermelon, tofu, black beans, pears, apples, chrysanthemums, green tea, and infusions of mint, lemongrass and lemon juice.
Cooking method directly influences Heat management: light steaming, foods consumed fresh or warm, clear soups and cool infusions refresh Heat. Grilling, frying, very hot spices, alcohol and coffee increase internal Heat.
Concrete Examples
A patient presenting with Liver Fire with Yin deficiency may experience pulsating migraines on the temples, red and dry eyes, irritability, dizziness, thirst, a red tongue with a dry yellow coating on the edges, and a rapid and wiry pulse. The dietary protocol will include cooling and Yin-nourishing foods such as tofu sautéed with mushrooms and spinach, fresh pear juice, cucumbers in light salad, chrysanthemum and lemon juice infusions, and black sesame seeds dry-roasted in small quantity.
A child presenting with external Heat (acute fever with cold) may present high fever, sweating, intense thirst, a red and sore throat, a red tongue with yellow coating, a rapid pulse and agitation. The dietary protocol will include very fresh and hydrating foods such as fresh watermelon juice (in small quantity), steamed pears, grated cucumber, chrysanthemum infusions sweetened with a little honey, and clear vegetable soups with tofu.
Frequently Asked Questions
What is the difference between Heat and Fire?
In TCM, Heat (热 Rè) and Fire (火 Huǒ) are related but distinct concepts. Heat is a pathogenic factor that can be external or internal, of a more diffuse and moderate nature. Fire is a more intense, localised and acute manifestation of Heat, often internal, with more violent signs (ulcerations, bleeding, extreme agitation). One might say that Fire is Heat that has intensified and localised.
How to recognise Heat?
The classic signs of Heat include thirst (with desire for cold drinks or large quantities), sensation of heat (especially in the evening for internal Heat), sweating (especially by day for external Heat, or nocturnal for Yin Heat), redness of the face and eyes, red tongue with yellow coating (external Heat) or without coating/dry (Yin Heat), rapid and full pulse (external Heat) or rapid and thin (Yin Heat), agitation, irritability, mouth ulcers, infections, yellow phlegm, dark and scanty urine, and dry stools or fetid diarrhoea.
Which foods clear Heat?
Foods that clear Heat are generally of cool or cold nature, rich in fluids, and consumed fresh or warm. These include cucumber, courgette, melon, watermelon, tofu, black and aduki beans, pears, apples, chrysanthemums, green tea, mint, lemongrass, lemon juice, spinach, beetroot, seaweed, mussels and chrysanthemum infusions. Foods to avoid are grilled foods, fried foods, very hot spices, alcohol, coffee, chocolate and heavy meals.
Conclusion
Heat constitutes the pathogenic factor of excess and consumption in Traditional Chinese Medicine. Understanding its causes, manifestations and cooling dietary approaches enables a better grasp of the therapeutic reasoning and support protocols proposed in the Yin Shi universe.
- Cold
- Dampness
- Yin deficiency
- Blood
- Liver
To go further
Yin Shi ecosystem resources directly related to this article.
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