Qi is a Yang substance, whereas Body Fluid is a Yin substance. The relationship between Qi and Body Fluid is similar to the relationship between Qi and Blood. However, blood exists only in the vessels while Body Fluid exists in all portions of the body. Qi transformation motivates the generation of Body Fluid. Qi transports the circulating Body Fluid. If Qi’s control is decreased in any way, it will lead to unusual loss of Body Fluid, manifesting as incessant sweating, polyuria, enuresis, etc. The treatment will be to reinforce Qi to save the fluid.
Body Fluid transforms and carries Qi; Qi guards and controls Body Fluid. TCM considers, “Collapse of Qi results from great loss of Body Fluid.”