San Jiao is a term found in traditional Chinese medicine (TCM), as part of the modelling of the workings of the human body attempted by early Chinese medical writers. References to it can be found in the oldest Chinese medical texts available, including the Yellow Emperor's Huang Di Nei Jing.The identification of disease according to the Three Burners (三 焦) was first described in the Qing Dynasty (1644-1911) by Wu Ju Tong (吳鞠通, 1758–1836) in his book A Systematic Identification of Febrile Diseases.. This system is used within the practice of Chinese herbal medicine, in conjunction with acupuncture and other Chinese medicine (TCM) modalities. Note that the San Jiao theory differs slightly from the San Jiao organ, or channel [(Shou Shao Yang, san jiao jing)]; referred to additionally as "Triple Heater", San Jiao, and "Triple Burner". Viewed by Chinese Medicine as the passage of heat and fluid throughout the body, Elementary Questions (su wen)' explains, "The Triple Burner holds the office of the sluices; it manifests as the waterways."
The system is often combined with Four Stages theory when diagnosing and treating an externally contracted disease caused by a wind-heat pathogen. The disease will be diagnosed and understood according to its location within the three burners.
San Jiao has been translated as "triple heater", triple warmer (or three warmers)", and "triple burner", the latter of which is probably favored because of the involvement of the San Jiao in metabolism. The current World Health Organisation standard term is "Triple Energizer" (TE), but many authors still prefer to use San Jiao.
There is no organ in Western medicine which corresponds to San Jiao, but The Triple-Burner is said to occupy the Thoracic and Abdomino-Pelvic cavities:
- Upper Jiao (上焦)
- Middle Jiao (中焦)
- Lower Jiao (下焦)
In TCM theory, the San Jiao is a yang organ paired with the pericardium (Xin Bao) which is the yin organ associated with it. Yang (Fu) organs are typically hollow, whereas yin (Zang) organs are more solid. The triple burner, however, is said to be primarily energetic and does not have a physical component, unlike all the other organs in TCM. In dissecting a body, one would not be able to find a structure that could be called the San Jiao.
The San Jiao's Hand-Foot partner is Dan (Gall Bladder).
The San Jiao is also said to be a metabolism mechanism similar to an old-fashioned water wheel that is turned by incoming water and creates energy for accomplishing a task, such as grinding grain in the case of the water wheel, or for metabolising and digesting food in the case of the San Jiao. The San Jiao is closely associated with the spleen functions of transformation and transportation, particularly the metabolism of incoming food. The San Jiao is also closely associated with the kidney's function in TCM. The San Jiao, however, is not limited to one metabolism function as the spleen or kidneys are, but is a general metaboliser which can be applied to a variety of metabolism needs.
This dual usage of San Jiao to refer to a specific metabolic function and to refer to the areas of the body is a source of confusion, and care should be taken to make it explicit which is being referred to.
San Jiao is related to the fire element of the Chinese Five Elements.
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