Six Pernicious Influences

Star

六淫 (Liù Yín)

Pathogenic Factors

The six external climatic factors that can cause disease.

Overview

The Six Pernicious Influences — Wind, Cold, Summer-Heat, Dampness, Dryness, and Fire/Heat — are environmental factors that invade the body when defenses are weak.

Key Points

  • External climatic pathogens
  • Often combine (e.g., Wind-Cold, Damp-Heat)
  • Invade when Wei Qi is weak

Clinical Significance

Each has characteristic signs and treatment principles; they frequently combine.

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