The Chinese Herbal Medicine Database
Probably the best English-language database on Chinese herbs. It covers hundreds of herbs and include plenty of details on each herb, including the latest scientific research.
Revise your TCM theory by reading on Zang-Fu Organs and their functions.
They are us and we are them, read about the vital substances according to Chinese Medicine. Qi, Blood, Essence, etc. Everything you need to know on each substance.
Yin-Yang, the Five Elements theory, the Eight principles, etc. See a list of basic Chinese Medicine concepts and an explanation for each.
The Eight Principles
The Eight Principles (Interior/Exterior, Hot/Cold, Excess/Deficiency and Yin/Yang) help practitioners determine patterns affecting their patients. Read what each one means.
The Six Pernicious Influences
The Six Pernicious Influences are the primary external cause of diseases according to Chinese Medicine. Read a detailed description of each one.