[Re-discussion on "Fenglong (ST 40) for phlegm"]

Area of Science:

• Traditional Chinese Medicine
• Acupuncture and Moxibustion
• Gastrointestinal Disorders

Background:

• The efficacy of Fenglong (ST 40) for phlegm disorders is a subject of ongoing research and historical interpretation.
• Previous studies suggest its application for phlegm disorders became widespread during the Ming Dynasty.

Purpose of the Study:

• To trace the historical evidence for Fenglong (ST 40)'s effect on phlegm disorders.
• To analyze the evolution and standardization of Fenglong (ST 40)'s indications.
• To present an alternative interpretation of Fenglong (ST 40)'s mechanism in treating phlegm.

Main Methods:

• Historical literature review of 9 ancient acupuncture and moxibustion texts.
• Analysis of indications and their changes over time.
• Comparative examination of different interpretations of Fenglong (ST 40)'s function.

Main Results:

• Fenglong (ST 40) primarily strengthens the spleen and resolves dampness, addressing a broader concept of "phlegm/dampness".
• Since the Ming Dynasty, its application has narrowed to focus on visible sputum from the lungs, a more specific definition of "phlegm".

Conclusions:

• The historical application of Fenglong (ST 40) for phlegm disorders has evolved from a broad interpretation of dampness to a narrower focus on lung-related phlegm.
• The academic viewpoint of "Fenglong (ST 40) for phlegm" requires more robust evidence for comprehensive validation.