Warm Disease & Epidemics — the 4 books the tradition kept on this shelf
Written in centuries of epidemics. These four books are where the tradition separated 'warm disease' from 'cold damage' and started describing fever by stages of depth — the reasoning behind how a febrile illness is watched day by day.
Every entry below is taken from the same catalogue the product is built on: the title, the hand behind it, when it sits in time, what the book works on, and what it changed. Sentences in bold are the ones we can point an outside source at; the rest is our summary of the book, not a claim from it.
Treatise on Pestilence (温疫论)
明·吴有性 · Ming (1642) · Wen Yi Lun
Works on: Epidemics, not ordinary colds. The premise is stated flatly: pestilential illness is neither wind, cold, summerheat nor damp but a separate kind of qi, taken in through mouth and nose, lodging halfway between surface and interior in a place called 膜原 — which is why forcing a sweat achieves nothing and why purging has to be thought about. The upper scroll walks the epidemic case by case: onset, unpredictable transmission, when to attack at once, surface and interior splitting apart, shaking-sweat, rash, the fallout after purging, old patients against young, then several headings on drugs misadministered. A lower scroll and a supplement follow. Entries are named by mechanism and situation, never by disease label.
What it changed: It pulled contagion out of climate: this qi, when it comes, takes old and young, strong and weak alike, and whoever touches it falls ill. Three questions then have answers — where it enters (mouth and nose), where it lies (the membrane source), where it is going (nine transmissions, with a warning that one patient has one of them, not all nine). And one methodological line: holding to ancient rules does not fit today's illness. That account lines up almost exactly with modern respiratory and faecal-oral spread; the book moved to Japan and was recut there.
Systematic Differentiation of Warm Disease (温病条辨)
清·吴瑭 · Qing (1813) · Wen Bing Tiao Bian
Works on: Febrile illness of the warm type, filed by body region rather than by channel: an upper, a middle and a lower burner section, each subdivided by disease — wind-warmth, warm-reckoning, warm pestilence, warm toxin, winter-warmth, then summer-warmth, latent summerheat, damp-warmth and cold-damp, warm malaria, autumn dryness. Before any of it a preliminary section quotes the Inner Classic clause by clause, so the argument starts from wording a reader can look up. Every clause runs the same way: signs and pulse, then one named formula, then the principle it is said to be exercising.
What it changed: It left an axis and says so itself: cold-damage is read across, from surface inward; warm disease is read down, burner by burner — set the two side by side and little of diagnosis falls outside one horizontal and one vertical. Its discipline is more reusable still: every clause names the Inner Classic principle it rests on, and a formula appears once, after which the text points back. That geography, with the four levels, is still how East Asian medicine talks about febrile illness.
Treatise on Warm-Heat (温热论)
清·叶桂（叶天士） · Qing (18th c.) · Wen Re Lun
Works on: Thirty-seven short notes carrying one continuous argument: warmth enters from above and reaches the lung first, then deepens through four strata — wei at the surface, then qi, then ying, then blood. Each stratum comes with something observable: coating colour, rash, dry teeth, thirst, clarity of mind, stool and urine. Each comes with a limit too — sweat while it is at wei, clear heat only once it is at qi, draw the heat outward at ying, cool and disperse at blood. Formula names are rare; the subject is what you see and how far you may still push.
What it changed: The four levels became the shared map of warm disease; this book supplies the tests. Its opening clause packs entry point, first organ and worst route into twelve characters: warm evil arrives from above, the lung is struck first, the pericardium is the reversal. Tongue colour, rash and dry teeth are written as fields — clause 27 has you light the chest and flanks with a paper twist and tell spot from pustule by size — and "secure first the ground the evil has not reached" turns prevention into a move.
Chapter on Damp-Heat Disease (湿热病篇)
清·薛雪 · Qing (18th c.) · Shi Re Bing Pian
Works on: One illness class: damp tangled with heat. The format is a clause and then the author's own note under it. The clause states what is seen — number one is the outline: chill first, then heat without chill, sweating, chest tightness, white coating, thirst without desire to drink — and the note gives the mechanism and the reasoning behind the choice. From there it works outward: damp at the surface, in the muscles, inside, in the channels, clouding the upper burner, reaching the pericardium, convulsion and reversal, blood involved. The last few clauses turn to dysentery and to summer cold-damp from too much relief in the cool.
What it changed: Three things survive. The format: signs in the clause, reasoning in the author's own note, so the reader gets what was seen and what was thought at once — checkable, and answerable. The variable: damp and heat as a ratio rather than a label, decided by dry or greasy tongue, loose or hard stool, thirst or no thirst. And cross-reference: clause nine tells you to read it against clause thirty-one, which makes the book a net rather than a row. Damp-heat became a trackable course, and from the late Qing on it was required reading for warm-disease schools across East Asia.
Where this leaves our product
Qicura reads a described symptom against this kind of material and returns a pattern in plain language with the sources named. It does not dispense: no herb quantities, no formula composition, no preparation instructions, and no needling technique - those are deliberate limits enforced on the server, not wording we soften for a page.
Educational, self-care content - not a medical diagnosis. For personal advice, consult a qualified practitioner.