Which term describes the deficiency of Qi, Blood, Yang, or Yin in TCM?

In Traditional Chinese Medicine (TCM), the term that encompasses the deficiency of Qi, Blood, Yang, or Yin is referred to as "XU." This term indicates a deficiency state that can affect any of the fundamental substances that support life and health.

Understanding "XU" is important, as it broadly represents a state where the vital substances of the body are lacking, leading to various health issues. For instance, Qi deficiency may result in fatigue and lack of energy, Blood deficiency can cause issues such as paleness and weakness, Yang deficiency often leads to coldness and lethargy, and Yin deficiency can manifest as symptoms associated with heat and dryness.

In contrast to "XU," the other terms provided do not encompass the full range of deficiencies described. "Shi" refers to excess rather than deficiency, while "Xue" specifically means Blood and does not imply a general deficiency in Qi, Yang, or Yin. "Xue Xu" specifically indicates Blood deficiency, which is just one aspect of the broader deficiency picture.

Thus, "XU" is the most appropriate term as it succinctly captures the concept of deficiency across the various vital substances recognized in TCM.