Korean medicine sorts infectious illness into two broad families according to what drives them — cold, or heat — and the two behave quite differently. The constitutions are not equally exposed to both. This article is about cold damage and warm disease, and which types each one tends to hit hardest.
Before the rest
This describes tendencies in how illness develops, in the framework of Korean Traditional Medicine. It is not a guide to treating infection. High fever, difficulty breathing, confusion, a rash that does not fade under pressure, or any rapidly worsening illness needs medical care promptly, whatever your constitution.
In Summary
- Cold damage (상한 傷寒) is driven by cold. It develops relatively slowly, cold works its way inward, and qi binds and stagnates. Chills, fever and headache; the common cold is the everyday example.
- Warm disease (온병 溫病) is driven by heat. It starts abruptly and changes fast, burning through fluids and blood. High fever, thirst, clouded consciousness, rashes.
- Warm disease subdivides: warm-heat illness, fast and fluid-depleting; and damp-heat illness, slower and longer, heavy and sticky, often with diarrhoea.
- A classical principle: cold injures form; heat injures qi. Pain first then swelling points to cold damage; swelling first then pain points to warm disease.
- Hepatonia and Cholecystonia are more exposed to cold damage — their qi gathers inward, so incoming cold cannot be dispersed and binds inside.
- Pulmotonia and Colonotonia are more exposed to warm disease — their qi disperses outward, so heat drives excessive discharge and fluids run out fast.
- These are tendencies. Any constitution can have either.
Two Families of Illness
Korean Traditional Medicine (KTM), the traditional healing system of Korea also known as Hanbang (한방), distinguishes illness caused by an external pathogen into two families, and they differ in onset, course and what they damage.
Cold damage
- Driver: mainly cold. Cold pathogenic influence enters the body, suppresses yang qi, and obstructs the flow of qi and blood.
- Onset: comparatively gradual; cold seeps inward and affects the internal organs.
- Character: chills, fever and headache are prominent; qi binds inward and stagnates.
- Everyday example: the common cold, general aches.
Warm disease
- Driver: mainly heat. The heat pathogen damages the body’s fluids and blood as it progresses.
- Onset: abrupt, with rapid change. It can begin at a relatively superficial level and move quickly deeper, where fluids and blood are consumed.
- Character: high fever, thirst, clouded consciousness, rashes — the signs of heat-toxin. Heat boils off fluids and the body dries.
- Example: highly contagious infections of hot climates.
Warm disease has two sub-forms. Warm-heat illness starts suddenly, changes fast, and depletes fluids quickly. Damp-heat illness is slower and longer-lasting: heat and damp stagnate together, symptoms are heavy and sticky, and digestive disturbance — diarrhoea — often accompanies it.
Cold Injures Form, Heat Injures Qi
The Suwen puts it compactly: cold injures form; heat injures qi. Cold condenses the body’s physical substance; heat drives its functional activity too hard and uses it up.
A second line follows: when qi is injured there is pain; when form is injured there is swelling. From this the course can be read:
- Pain first, swelling after — qi was injured and then form. Stagnation produces pain, and physical damage follows. That is the cold-damage pattern.
- Swelling first, pain after — form was injured and then qi. Physical damage appears first, and the obstruction it causes brings pain after. That is the warm-disease pattern.
Which Constitutions Are More Exposed
Cold gathers and condenses qi and blood; warmth pushes them outward and spends them. From that, constitutional tendencies follow.
Hepatonia and Cholecystonia: more exposed to cold damage
The Wood constitutions have strong liver qi and comparatively recessive lung qi. The lung governs the skin and airway and disperses energy outward.
These are constitutions whose qi gathers inward by default. When cold comes in from outside they cannot disperse it, and it binds internally. So they are more exposed to the illness whose problem is qi collecting inside — and when cold does get in, it tends to affect the internal organs, producing digestive trouble or pain from stagnation.
Pulmotonia and Colonotonia: more exposed to warm disease
The Gold constitutions (Taeyangin) have strong lung qi and comparatively recessive liver qi. Strong lung qi tends to send energy outward and spend it.
When a heat pathogen enters a constitution already inclined to discharge outward, discharge becomes excessive and fluids and qi are consumed quickly. So these types are more exposed to warm disease, and in particular to the fast, fluid-depleting warm-heat form.
This is the same inward/outward axis that runs through the rest of this site — here it shapes not what suits a person, but how an illness unfolds in them.
A Tendency, Not a Rule
None of this means cold damage belongs to one type and warm disease to another. Any constitution can have either. The constitutional picture tells you which way an illness is more likely to go, and it is worth knowing which infections are more dangerous in the climate and region you live in.
Summary
Cold damage binds inward and slowly; warm disease burns outward and fast. Constitutions whose qi already gathers inward are more exposed to the first, and constitutions whose qi already disperses outward are more exposed to the second.
Related: What Fever Is For · Why Summer Colds Are Different
