Zhu Bing Yuan Hou Lun (诸病源候论): The First Chinese Text on Disease Causes and Symptoms

What Is Zhu Bing Yuan Hou Lun?

Zhu Bing Yuan Hou Lun (诸病源候论), the “Treatise on the Causes and Symptoms of Diseases,” is a landmark text in the history of Chinese medicine. Completed in 610 AD during the Sui Dynasty, it was the first comprehensive systematic catalog of disease etiologies and symptomatology in Chinese — and possibly world — medical history.

Compiled by the court physician Chao Yuanfang (巢元方) and his team, this massive work described over 1,700 disease conditions organized into 67 categories across 50 volumes. It was commissioned by Emperor Yang of Sui as an official reference for the imperial medical service.

Historical Context

The Sui Dynasty (581–618 AD)

• A brief but transformative dynasty that reunified China after centuries of division
• The Sui emperors invested heavily in standardizing knowledge — medicine, law, and administration
• This institutional approach led to the first government-commissioned medical encyclopedias

Chao Yuanfang

• Served as the Tai Yi (太医) — chief court physician
• Led a team of medical scholars in compiling the text
• Drew on the Huangdi Neijing, Shanghan Lun, and numerous earlier texts now lost
• Combined theoretical knowledge with clinical observations from the imperial court

Structure and Content

The text is organized into 50 volumes covering 67 categories of disease (病候), containing descriptions of 1,739 distinct disease conditions (证候).

Major Categories

Category	Examples
External causes	Wind, Cold, Heat, Dampness diseases
Internal damage	Overwork, emotional causes, dietary injury
Respiratory	Cough, asthma, Lung conditions
Digestive	Vomiting, diarrhea, abdominal disorders

• Circulatory | Pulse irregularities, Blood disorders | | Urinary | Urination difficulties, edema | | Reproductive | Women’s diseases, pregnancy, postpartum | | Skin | Rashes, ulcers, furuncles | | Eyes, Ears, Nose, Throat | Sensory organ conditions | | Trauma | Wounds, fractures, burns | | Pediatric | Children’s diseases | | Toxicology | Poisoning, venomous bites |

Key Contributions

1. First Systematic Etiology Framework

Before this text, disease causes were discussed piecemeal across various texts. Chao Yuanfang created the first organized system:

• External causes: The Six Pathogens (Wind, Cold, Heat, Dampness, Dryness, Summer Heat)
• Internal causes: The Seven Emotions (anger, joy, worry, grief, fear, fright, excessive thinking)
• Neither internal nor external: Dietary injury, overwork, trauma, animal bites

2. Detailed Symptom Description

For each of the 1,739 conditions, the text describes:

• The cause (etiology in TCM terms)
• The mechanism (how the cause produces the disease)
• The symptoms (what the patient experiences)
• Notably, the text does NOT include treatment — it focuses purely on diagnosis

3. Notable Disease Descriptions

Several conditions were described here for the first time with remarkable accuracy:

Condition	TCM Name	Description
Diabetes (Xiao Ke)	消渴	”sweet urine” — excessive thirst, hunger, and urination
Goiter (Ying Qi)	瘿气	Neck swelling from water and soil factors (iodine deficiency)
Beriberi (Jiao Qi)	脚气	Leg weakness and swelling from damp regions
Malaria-like diseases	疟病	Recurrent fever with chills at regular intervals
Intestinal parasites	九虫	Detailed descriptions of various parasitic worms
Rabies	狂犬咬	Recognized as transmitted by dog bites with specific symptoms

4. Understanding of Contagion

The text contains early insights about disease transmission:

• Recognized that some diseases spread through contact and proximity
• Described “Qi of epidemic disease” (疫疠之气) — an early concept of infectious agents
• Noted that wind-borne diseases could affect entire communities simultaneously

5. Pediatric and Women’s Health

• Dedicated sections for children’s diseases — one of the earliest pediatric texts
• Detailed descriptions of pregnancy complications and postpartum conditions
• Described conditions unique to newborns and infants

6. Emotional Causes of Disease

The text expanded the understanding of how emotions cause disease:

• Anger damaging the Liver
• Excessive joy disturbing the Heart
• Worry and overthinking weakening the Spleen
• Grief affecting the Lungs
• Fear depleting the Kidneys

Influence on Later TCM

Direct Influence

• Sun Simiao drew heavily on this text for his Qianjin Yifang (Thousand Golden Formulas)
• The text became a standard reference for disease identification throughout the Tang, Song, and Ming dynasties
• Every subsequent Chinese medical encyclopedia referenced its disease categories

Conceptual Legacy

• The etiology-symptom-description format became the standard for all later medical texts
• The classification of 1,739 conditions remained the basis of TCM disease taxonomy for centuries
• The three-category etiology system (external, internal, neither) influenced all subsequent TCM theory
• The text’s focus on disease mechanism (病机) helped develop TCM’s unique approach to understanding pathology

International Influence

• Translated into Japanese and Korean during the Tang Dynasty
• Influenced the development of traditional medicine in both countries
• Japanese physicians used it as a primary reference through the Edo period

What Makes This Text Unique

Feature	Zhu Bing Yuan Hou Lun	Other Classical Texts
Focus	Causes and symptoms	Treatment and formulas
Approach	Descriptive, catalog-style	Theoretical or prescriptive
Treatment	None — diagnosis only	Primary focus
Scope	1,739 conditions	Varies — usually narrower
Commission	Government official project	Individual authorship

The deliberate exclusion of treatment formulas is significant — Chao Yuanfang believed that understanding the cause and mechanism was the essential foundation, and that treatment should follow from correct diagnosis. This emphasis on diagnostic precision before treatment remains a TCM principle today.

Key Takeaways

• Zhu Bing Yuan Hou Lun (610 AD) is the first systematic catalog of disease etiology and symptoms in Chinese medicine
• Compiled by Chao Yuanfang during the Sui Dynasty — a government-commissioned medical reference
• Described 1,739 disease conditions in 67 categories — a scale unprecedented at the time
• First to accurately describe diabetes, goiter, beriberi, and many other conditions
• Deliberately excluded treatment to focus purely on diagnostic understanding
• Its etiology framework (external, internal, neither) became the foundation of TCM disease theory

Disclaimer: This article is for educational purposes only. Consult a licensed TCM practitioner for diagnosis and treatment.

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