Consumptive Disease / Xu Lao
Updated 2026-08-01
INTRODUCTION
English translation pending.
CORE DEFINITION
A traditional Chinese medicine category describing chronic depletion of qi, blood, yin and yang across the five organs. It is not one disease but a systemic state of wear and overdraw, arising from constitutional weakness, prolonged illness, overwork or excessive depletion. Presentations include fatigue, emaciation, palpitations, shortness of breath, low-grade fever and night sweats. Treatment rebuilds the foundation slowly, as with Xiao Jianzhong Tang, rather than attacking, and the rate of rebuilding is limited by what the weakened system can absorb.
SCAFFOLDING EFFECT
Reduce cognitive load
- Recognise Attrition: distinguish a long losing war of depletion from a short acute episode - Rebuild Slowly: restore the foundation gradually instead of applying a strong corrective push - Protect the Root: cut the ongoing drain before adding more resources to the system
Anchor fast decisions
In an acute illness the system is intact and fighting a temporary threat, so a strong intervention can resolve it. In depletion the reserves themselves are gone, so the same intervention has nothing to work with and further drains what remains. Restoring function requires supplying material at a rate the weakened system can actually absorb, which is why the process is gradual and supportive rather than forceful. Pushing harder in a depleted system makes the depletion worse.
MINIMUM ACTION
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