The Dry Fire Body Constitution essentially indicates a lack of Yin (Cooling energy) in the body. The Yin in Chinese Medicine include Kidney Yin, blood and body fluids. Kidney yin, also called true yin, is the foundation of the yin fluid of the whole body; it moistens and nourishes the organs and tissues. When there is not enough Yin to balance the Yang there will be too much heat inside the body leading to heat symptoms such as mouth ulcers or acnes. When the body is lacking in blood and body fluids, the skin becomes malnourished and gradually dries up. The throat can also become dry, which can lead to constant thirstiness or being prone to coughing.