Pathology of Yin and Yang
Yin Deficiency
In Yin Deficiency, the functions of Yang dominate. Yin is too weak to restrain Yang. The resulting symptoms are either expression of the relative excess of Yang or of the weakness of Yin. Which symptoms appear, depends on the involved organs.

Yin Deficiency |  | Yin Deficiency or Yang Excess. This form is called Deficient Heat and is discussed at Yang Excess.

TCM Information Symptoms, causes, treatment tips, root and branch, point-combination Pathogenesis of selected symptoms Heat-sensation, heat in the five centers: Because Yin's cooling function is restricted, Yang warms the body too much. Night sweat: At night, the Defense-Wei Qi, that circulates in the body-surface during the day, moves back in the Yin organs. In Yin Deficiency, Heat inside the body is increased. At night, this Heat is even strengthen by the Defense-Wei Qi inside the body, so that the Body Fluids are driven out of the body in the form of sweat. Symptoms of Dryness like thirst, dry throat, decreased, darker, fatty or gluey secretions, constipation: Because the moistening function is restricted, symptoms of Dryness develop. In the same manner, can Yang, that is no longer cooled, evaporate the Body Fluids. Hyperactivity: Because the calming effect of Yin is weakened, the activity of Yang can increase excessively. Emaciation: Emaciation is a sign of lacking Body Fluids. The symptoms of Yin Deficiency appear, if a relative Yin Deficiency exists. Clinically it is important to determine which of the patients organs is affected by the deficiency. This question can be answered if one's differentiation is based on the organ specific symptoms. Kidney, Liver, Stomach, Lungs and Heart are the organs in which Yin Deficiency is most likely to manifest.