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The Theory of Five Elements

The Theory of Five Elements

Similar to the theory of yin-yang, the theory of five elements � wood, fire, earth, metal and water � was an ancient philosophical concept used to explain the composition and phenomena of the physical universe. In traditional Chinese medicine the theory of five elements is used to interpret the relationship between the physiology and pathology of the human body and the natural environment. According to the theory, the five elements are in constant move and change, and the interdependence and mutual restraint of the five elements explain the complex connection between material objects as well as the unity between the human body and the natural world.

In traditional Chinese medicine, the visceral organs, as well as other organs and tissues, have similar properties to the five elements; they interact physiologically and pathologically as the five elements do. Through similarity comparison, different phenomena are attributed to the categories of the five elements. Based on the characteristics, forms, and functions of different phenomena, the complex links between physiology and pathology as well as the interconnection between the human body and the natural world are explained.

The five elements emerged from an observation of the various groups of dynamic processes, functions and characteristics observed in the natural world. The aspects involved in each of the five elements are follows:

Fire: draught, heat, flaring, ascendance, movement, etc.

Wood: germination, extension, softness, harmony, flexibility, etc.

Metal: strength, firmness, killing, cutting, cleaning up, etc.

Earth: growing, changing, nourishing, producing, etc.

Water: moisture, cold, descending, flowing, etc.

 

The following table shows the categorization of phenomena according to the five elements:

 

Wood

Fire

Earth

Metal

Water

Flavors

sour

bitter

sweet

pungent

salty

Zang

liver

heart

spleen

lung

kidney

Fu

gall bladder

s. intestine

stomach

l. intestine

urinary

Senses

eye

tongue

mouth

nose

ear

Tissue

tendon

vessel

muscle

hair/skin

bone

Directions

east

south

center

west

north

Changes

germinate

grow

transform

reap

store

Color

green

red

yellow

white

black

Between the five elements there exists close relationships that can be classified as mutual promoting and mutual restraining under physiological conditions, and mutual encroaching and mutual violating under pathological conditions. By mutually promoting and restraining, functions of the various systems are coordinated and homeostasis maintained. By encroaching and violating, pathological changes can be explained and complications predicted.

The order of mutual promoting among the five elements is that wood promotes fire, fire promotes earth, earth promotes metal, metal promotes water, and promotes generates wood. In this way each of the five elements has this type of mutual promoting relationship with the other, thus promoting is circular and endless. According to the order of mutual restraining, however, wood restrains earth, metal restrains wood, etc. Each of the five elements also shares this restraining relationship with the other. Mutual promoting and mutual restraining are two aspects that cannot be separated. If there is no promoting, then there is no birth and growth. If there is no restraining, then there is no change and development for maintaining normal harmonious relations. Thus the movement and change of all things exists through their mutual promoting and restraining relationships. These relationships are the basis of the circulation of natural elements.

Encroaching and violating are the pathological conditions of the normal mutual promoting and restraining relationships. Encroaching denotes that the restraining of one of the five elements to another surpasses the normal level, while violating means that one of the five elements restrains the other opposite to the normal mutual restraining order.