The bladder is like a mirror, the mirror of the organs, well-known acupuncturists (on the Bladder meridian are the Shu-Assentiments points of all organs).
It is a reflection of the functioning of each organ and evokes the lucidity with which one can apprehend reality.
It is coupled to the kidneys. This couple watches over the blood balance by filtering the metabolites that control cellular activity and eliminating toxins. It is particularly requested in winter.
By decreasing perspiration, urination is more important in the cold season.