Traditional Chinese Medicine (TCM) is a system of diagnosis and treatment developed in China over roughly two thousand years, built on the idea that health depends on balance — within the body, and between the body and its environment. It encompasses several practices, including acupuncture, herbal medicine, dietary therapy, and manual therapies such as cupping and tui na. Sherman Lai, who practised TCM and acupuncture in Guelph, Ontario, from 1986 to 2023, offers one practitioner's perspective on a field that remains widely used but often misunderstood in North America.
Core concepts: Qi, Yin-Yang, and the five elements
TCM theory holds that a vital energy called Qi circulates through the body along pathways known as meridians. Illness, in this framework, reflects a blockage or imbalance in that flow. Related to this is the concept of Yin and Yang — complementary, opposing forces that must remain in balance for the body to function well — and the five-element framework (wood, fire, earth, metal, water), which is used to map relationships between organs, emotions, seasons, and other aspects of health. These concepts don't map directly onto Western biomedical categories, which is one reason TCM diagnosis often looks different from a conventional medical workup.
How TCM diagnosis differs from a Western medical exam
Where Western medicine typically isolates and treats a specific diagnosed condition, TCM diagnosis aims to identify a broader "pattern" — a constellation of symptoms, pulse qualities, tongue appearance, and other signs that together indicate where and how the body's balance has been disrupted. Two patients with the same Western diagnosis might receive different TCM treatment plans if their underlying patterns differ. This is part of what Lai has described as treating the root rather than the branch — addressing the underlying imbalance rather than only the symptom it produces. A fuller discussion of that diagnostic philosophy is in How Traditional Chinese Medicine Diagnoses Illness.
Acupuncture's place within TCM
Acupuncture — the insertion of thin needles at specific points on the body — is the best-known TCM technique in the West, and the one with the most Western clinical research behind it. Studies, including research from the University of Toronto cited on this site's Research & Practice page, have examined how acupuncture may stimulate the body's own pain-modulating and anti-inflammatory responses — a mechanism also summarized in the U.S. National Institutes of Health's overview of acupuncture research. It's one of several tools within the broader TCM framework, typically used alongside herbal medicine and lifestyle guidance rather than as a stand-alone treatment.
A Guelph perspective
Lai practised an integrative version of TCM that combined these traditional frameworks with Western science and nutritional science — a model he applied at the Centre of Integrative Natural Medicine in Guelph for nearly four decades. For more on his specific approach and career, see Who Is Sherman Lai? and the FAQ page for quick answers to common questions about his background.