Introduction to TCM

Basics of TCM

  • Yin-Yang | Five Elements

Zang-Fu Theories

  • Zang Organs | Fu Organs

Classification of Antineoplastic Herbal Medicines

Characteristics of Herbal Medicines


  • By Auscultation & Olfaction
  • By Inspection


Theories of Channels (Meridians) and Collaterals

Reference: A Modern View of the Immune System

Differentiation of Syndromes

  • 8 Principles
  • 6 Channels 4 Stages
  • Syndromes of Zang-Fu Organs


  • Exogenous | Pestilential
  • Pathogenic Factors
  • Emotional

Materia Medica

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Summer-heat is the main pathogenic factor occurring only in the summer. It is a yang pathogenic factor. Its characteristics are described as follows:

Summer-heat is a yang pathogenic factor characterized by sweltering heat

If pathogenic summer-heat attacks the body, the clinical manifestations are yang-heat, syndromes, such as high fever, burning heat sensation of the skin, irritability, forceful and rapid pulse, etc.

Summer-heat consumes qi and yin (body fluid), and is characterized by upward direction and dispersion

Invasion of pathogenic summer-heat to the head region causes dizziness, vertigo, and excessive sweating due to the abnormal opening of the pores. Excessive sweating exhausts the qi and body fluid and manifests as thirst with desire to drink, dryness of the lips and tongue, constipation, yellowish and concentrated urine, etc.

Pathogenic summer-heat often combines with damp to cause diseases when the temperature and air humidity are very high

If summer humid-heat attacks the body, the manifestations are fever, heavy sensation of the head or even the whole body, stuffiness and fullness of the chest and epigastric regions, nausea, vomiting, abdominal distension, diarrhea, etc.

Pathogenic factors in summer are summer-heat, sun-stroke and summer humid-heat.

Main clinical manifestations of summer-heat: fever, excessive sweating, irritability, thirst with preference for cold drinks, shortness of breath, lassitude, general weakness, scanty and yellowish urine, rapid and xu (weak) pulse.

Main clinical manifestations of sun stroke: dizziness and vomiting for mild cases; sudden collapse, unconsciousness, profuse and cold sweating, cold extremities, forceful and xu pulse for severe cases.

This group of symptoms are caused by strong sun heat that internally affects the body qi activity leading to sudden prostration of qi and body fluid.

Main clinical manifestations of summer humid-heat: fever, irritability, stuffy chest, nausea, vomiting, anorexia, lassitude, loose stools, yellowish urine, soft pulse, yellow and sticky tongue coating, etc.

The symptoms resulting from summer humid-heat invasion include the common symptoms of summer-heat, such as fever, irritability, yellowish urine, etc., and the symptoms caused by the obstruction of dampened qi circulation, such as stuffy chest, nausea, vomiting and anorexia. Furthermore, there are also the symptoms of internal dampness, such as loose stools, soft pulse, sticky tongue coating, etc.

More about the other Exogenous Factors: Wind, Cold, Damp, Dryness, Fire Heat and Mild Heat.

Traditional Chinese Medicine pages by Raymond Cheng, PhD DPA FRSA FRSPH

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With over 3000 years of experience, Traditional Chinese Medicine (TCM) has remain one of the many fascinating areas in ancient Chinese culture. First known to be documented in the Yellow Emperor's Canon of Medicine, TCM is believed to have been practised in as early as 475 to 221 B.C. The field of working knowledge of TCM stretches from anything related to general healthcare practice to the philosophy of the mind, the logic of life, religion, and even to as far as cosmology and astronumerology. This is why in order to thoroughly understand the concepts behind TCM, one must be comprehensive in learning and embracing the Chinese culture as a whole.

Just as Douglas Hoff put it when he explained about accupuncture, "The systems of TCM uses the concepts of elements and meridians and are completely immersed in the Asian cosmology which takes shape through the religions." The meridian-brain mechanism, the fundamental working concept of acupuncture, in which the pain block from the message that the needle or burning cone of herbs gives to the point of stimulus, was only found centuries later by the West through science and technology.


Raymond Cheng, PhD DPA Thank you for visiting this TCM and acupuncture information website. If you have previously been to this website, you might have noticed that some of the pages on ancient historical ideas and holistic thinkings related to Chinese metaphysics are temporarily taken offline. This is because I will be revamping the whole website and be moving those information into a new \"Ancient Chinese Culture\" section so as to reflect a more current perspective on the interpretation of some of the fundamental concepts as well as to include some of the latest information in the area. But if you have just found this website for the very first time, I welcome you again and wish you could find what you require and, hopefully, you could also be benefitted from reading the articles I published on this website.

Please be patient and do come and check out this website frequently as it's being revamped.

Raymond Cheng, PhD DPA FRSA FRSPH

March 28, 2020.


This website is published, edited and designed by Raymond Cheng, and reflects only and only his personal views and opinions in his individual capacity. The information available at this website is not intended directly or by implication to either diagnose or treat any medical, emotional, or psychological condition or disorder. It is also not intended to create a physician-patient relationship between you and I or between you and Wyith Institute™ and The Office of Dr Raymond K K Cheng. The information here is not a substitute for advice and treatment provided by your physician or by another healthcare professional. It is always recommended that consultation with local healthcare providers be obtained for any of your specific health or medical concerns. Furthermore, any products that can be purchased (yet you can see I don't have much to sell here) through advertisers' banners or through links to other websites are not either explicitly or implicitly given any warranty or endorsement by me, my colleagues, Wyith Institute™ or any of its associated businesses.