Unilateral sweating is due to:

Question

BlackTom AI · Accepted Answer

Obstruction of meridians by wind-phlegm produces localized, often one-sided disturbances of Qi and fluid movement, so it is the cause of unilateral sweating.

1) Relevant knowledge points and concepts
- In Traditional Chinese Medicine (TCM) sweat is governed by Wei Qi (defensive qi) which circulates in the skin and through the meridians to open and close the pores. Normal distribution of sweat requires smooth, bilateral circulation of Wei Qi along meridians.
- Wind-phlegm is a pathogenic factor that can lodge in meridians/channels, obstructing the flow of Qi and body fluids locally. Wind-stroke or blockage of a channel often produces unilateral (one-sided) signs.
- Differentiation of sweating patterns: Yang (Qi) deficiency → spontaneous, generalized sweating; Yin deficiency → night sweating or five-centre heat; Middle burner heat → sweating with abdominal digestive heat signs, not strictly unilateral.

2) Step‑by‑step reasoning
- Unilateral sweating means sweating appears on one side of the body rather than diffusely.
- If Wei Qi is globally deficient, sweating would be generalized and worse with exertion (not strictly one-sided) → excludes Yang Qi deficiency.
- Yin deficiency causes nocturnal or tidal sweating due to internal heat from lack of fluids, again not a unilateral pattern → excludes Yin deficiency cause fire.
- Heat stagnation in the middle burner produces digestive/abdominal heat symptoms and possibly sweating, but this is systemic/central, not isolated to one side → excludes Middle burner heat.
- When wind-phlegm obstructs a particular meridian or channel on one side, the local circulation of Wei Qi and fluids is disrupted only there. That focal disruption explains why sweating can be limited to the affected side (classically seen in wind-stroke/hemiplegia patterns).

3) Intermediate steps (logical chain)
- Meridians carry Wei Qi → Wei Qi controls pores/sweat.
- Wind-phlegm lodges in one side’s meridian → local impediment of Wei Qi flow.
- Local impediment produces locally abnormal sweating → unilateral sweating.

4) Why the correct answer is correct
- Obstruction of meridians by wind-phlegm directly explains a unilateral, localized disturbance of sweating because it affects Wei Qi flow on one side only.

5) Why other options are incorrect (brief)
- A (Yang Qi deficiency): produces diffuse spontaneous sweating, not limited to one side.
- C (Yin deficiency cause fire): causes night or five-center sweating due to internal heat, not unilateral.
- D (Heat stagnation in Middle burner): causes central/digestive heat signs and possibly generalized sweating, not strictly unilateral.

6) Conclusion
- Therefore the correct choice is B. Obstruction of meridians by wind-phlegm explains unilateral sweating.

Unilateral sweating is due to:单项选择题

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