Body Fluids are all the fluids in the body, except from Blood. This means that their Deficiency will inevitable result in various symptoms of Dryness. Typical symptoms include dry skin, dry mouth, dry nose, dry cough, dry lips and dry tongue.

A Deficiency of Body Fluids can cause Yin Deficiency but it can also be caused by a Yin Deficiency. Indeed Body Fluids are part of Yin and it is sometimes a first step to a more generalized Yin Deficiency.

Other causes include a bad diet (for instance a diet that's too rich in drying foods such as baked foods) or a heavy and prolonged loss of fluids such as diarrhea, vomiting or sweating. Similarly, as there is a constant interchange between Body Fluids and Blood, a Deficiency of Fluids can also derive from a heavy loss of Blood, such as during childbirth, or from excessively heavy periods.

A Body Fluid Deficiency mostly affects the Lungs, Stomach, Kidneys and Large Intestine.

When it happens in the Lungs, it causes dry skin and dry cough. In the Stomach, it leads to dry tongue with horizontal cracks, dry mouth, desire to drink in small sips or no desire at all. In Kidneys, it gives rise to scanty urination, dry mouth at night and dry throat. In Large Intestine, it causes dry stools.