As Mother Earth begins the cycle of rebirth, the rise of Yang energy makes it very easy to accumulate heat in our bodies. Our livers and eyes are the first to suffer this heatiness. The Qi energy of spring is deemed to be have pathogenic influence resulting in sensitivities. TCM practitioner believes we should start by conditioning the livers (wood element) and nourishing the kidneys (water element) in Spring. As water begets wood, nourishing the kidney will help the healthy functioning of liver.