According to context of the word "turbid"in Yellow Emperor’s Inner Canon（ 黄帝内经） and the annotation of later doctors

the researchers sorted

concluded

reasoned and summarized the meaning of "turbid". The word "turbid"appears 58 times in Yellow Emperor’s Inner Canon（ 黄帝内经）

including 6 kinds material with nature of "turbid"such as turbid Yin

turbid Qi

blood turbidity

turbid fluid

turbid tears

and dull color. The researchers think turbid Yin is warm and humid that can moisten and nourish. Seven kinds of turbid Qi out of stomach

the five internal organs

clear Qi

cold Qi

cold and warm discomfort

improper diet

wind-cold invading lung and injury of lung are collectively known as the turbid Qi

among which

those generated from stomach

the five internal organs and clear Qi are physiological turbid Qi

and those generated from cold Qi

cold and warm discomfort

improper diet

wind-cold invading lung and injury of lung are pathological turbid Qi. Yang Qi accumulating too long or excessive Yin Qi leads to blood turbidity. Heat leads water to turbidity. Gallbladder heat causes turbid nasal discharge. Intracorporal pain disease

cold limbs disease and internal organs disease can respectively cause dull color in the glabella

jaw and the whole face. The above materials are turbid or chaotic

tend to inner and underneath

the low definition

or gooey

thick and high concentration.