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Wasting-thirst pattern is characterized by excessive drinking, excessive eating, copious urination, and bodily emaciation, sometimes with sweet-tasting urine. It is the classical TCM framework for metabolic consumptive diseases and overlaps substantially with — but is not identical to — modern diabetes mellitus. The core pathomechanism is depletion of yin fluids with predominance of dryness-heat, each reinforcing the other, with disease located principally in the Lung, Stomach, and Kidney. Prolonged disease injures qi and blood, with yin damage eventually extending to yang, and may produce sequelae such as sores, cataracts, night-blindness, edema, or stroke with hemiplegia.
Key differentiation: Upper wasting (Lung heat damaging fluids) features vexing thirst with copious drinking, dry mouth and tongue, with reddish tongue edges and a thin yellow coating. Middle wasting (Stomach heat blazing) features ravenous hunger, emaciation, and dry stools, with a red tongue and yellow coating. Lower wasting (Kidney yin vacuity) features frequent copious cloudy urine, lumbar and knee weakness, dizziness and tinnitus, with a red tongue and scant coating. Dual yin-and-yang vacuity adds cold aversion, cold limbs, impotence, and edema with a pale tongue and white coating. The three forms may appear alone or together and commonly progress from yin vacuity through qi-and-yin vacuity to dual yin-yang vacuity over time.
@misc{bencaodian-xiao-ke,
author = {{Bencaodian Editorial}},
title = {Xiao Ke 消渴 (Wasting-Thirst Pattern)},
year = {2026},
howpublished = {Bencao Dian: A Bilingual Knowledge Graph of Traditional Chinese Medicine},
url = {https://bencaodian.org/en/conditions/xiao-ke},
urldate = {2026-04-17},
note = {CC BY-SA 4.0}
}© Bencaodian Editorial · Licensed under CC BY-SA 4.0