[Characteristic of moxibustion and its warming-dredging effect].

Through the analysis on warming stimulation at moxa sites and the inflammatory purulent phenomenon by moxibustion, the author points out that moxibustion promotes qi and blood circulation is it's effective feature. It is viewed that "warming and dredging" is the high summarization of moxibustion effect. Moxibustion acts on expelling cold, promoting the circulation in meridian and collateral, clearing away heat, detoxification, strengthening the antipathogenic qi, preventing from diseases and healthcare, etc. All of these functions depend on the effect of moxibustion for circulating qi and blood flow. Hence, "warming and dredging" is the nature of moxibustion.