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

After reading the article, Tracing Origin and Development of "Fenglong (ST 40) for Phlegm": Examination and Verification published in Chinese Acupuncture & Moxibustion, the authors collected the original evidences also for the effect of Fenglong (ST 40) on phlegm disorders by tracing from 9 ancient books of acupuncture and moxibustion, explored the standardized expressions of its indications and analyzed the changes of its indications. In that article, it was viewed that the effect of Fenglong (ST 40) started to be generalized in treatment of phlegm disorders since the Ming Dynasty. On contrary, we believes that Fenglong (ST 40) works on strengthening the spleen and resolving dampness for the disorders caused by the broad meaning of "phlegm/damp". Based on it, since the Ming Dynasty, the effect of Fenglong (ST 40) is extended specifically for the disorders caused by the visible sputum from the lung, the narrowing mean of "phlegm". Hence, if "Fenglong (ST 40) for phlegm" is considered as an academic point of view, it needs an adequate evidences to expound and prove.