Formulas & Needles
How Does Acupuncture Produce Supplementation and Drainage Effects?
How does acupuncture, using only sterile stainless-steel needles without any medicinal substance, produce reinforcing (supplementation) or reducing (drainage) effects? This article explains the three core mechanisms: the body's functional state determining the direction of regulation, the specificity of acupoints with inherent tonifying or draining properties, and the practitioner's manipulation techniques with varying stimulation intensity. Together, these factors activate the body's intrinsic regulatory capacity to supplement deficiency and drain excess.
When treating disease with acupuncture, the only tools used are rigorously sterilized stainless-steel needles, which absolutely carry no tonic (supplementing) or purgative (draining) medicinal substances. So how do the effects of supplementation and drainage come about?
In essence, acupuncture treats disease primarily by needling acupoints along the meridians to regulate qi and blood, harmonize the zang-fu organs, and balance yin and yang. When the body is in a depleted state presenting as a deficiency pattern, needling can stimulate the functions of the zang-fu organs through the meridian system, promote the generation of qi and blood, and enhance bodily functions, thereby achieving the effect of supporting zheng qi and supplementing deficiency. When the body is in a state of exuberant pathogenic factors presenting as an excess pattern, needling can unblock the meridians, promote the movement of qi and blood, and regulate the zang-fu organs, thereby inhibiting excessive bodily functions and achieving the effect of dispelling pathogens and draining excess. In other words, acupuncture exerts a bidirectional, benign regulatory effect. Whether it supplements or drains is determined by the functional state of the body at the time of needling.
Furthermore, the therapeutic actions of acupoints not only possess universality but also exhibit relative specificity. Some acupoints are inherently inclined toward supplementation, while others are inherently inclined toward drainage. For instance, acupoints such as Shenque (CV8), Guanyuan (CV4), Qihai (CV6), Gaohuang (BL43), and Zusanli (ST36), when needled or moxibusted, are mostly able to invigorate the body's zheng qi, promote robust physiological function, and exert a strengthening effect, making them suitable for deficiency and debilitation disorders. Conversely, acupoints such as the Jing-well points, Shixuan (EX-UE11), Baxie (EX-UE9), Renzhong (GV26), and Weizhong (BL40) can drain pathogenic factors and suppress hyperactive bodily functions, exerting a pathogen-eliminating effect, and are frequently used clinically for pathogenic excess disorders.
Additionally, the manipulation techniques employed by the physician and the intensity of stimulation applied can also induce internal transformation within the body, producing either a supplementing or draining effect. Ancient acupuncture masters have accumulated extensive clinical experience in this regard, creating over a dozen different supplementation and drainage needling techniques. Whether the clinical condition is a deficiency pattern or an excess pattern, acupuncture is capable of producing a very favorable therapeutic effect.