The Water energy is a strong generative force centered in the lower belly. When the Kidney Qi is strong, a person is fearless, determined, and can endure many hardships in pursuit of their goals. Persevering by will power is characteristic of those with strong Kidney Qi. Longevity is also considered to be associated with healthy Kidney Qi, signified by large, elongated ear lobes, like those of the Buddha.
When the Kidney Qi is weak, there can be problems with water metabolism, urination, fertility, or sexuality. This person could be anxious, fearful, and withdrawn, and in more severe cases, phobic.
Kidney Qi declines with aging. There may be diminished hearing or ringing in the ears. In menopause, the Kidney yin declines, which is associated with classic signs of heat and dryness – hot flashes, night sweats, dry skin and mucous membranes. Kidney yang weakness is associated with cold – cold extremities, cold back and belly, declining sexual vigor, urinary frequency or incontinence.
The color of the Kidney is black, like the night, or like black ice. When the Kidney Qi starts to weaken, dark circles or pouches appear under the eyes. The Kidney Qi rules in the winter, a time when living things are contracted with cold. Like a seed deep in the cold ground, Qi is dormant, waiting for the time to sprout.