A patient presents with low-grade fever, night sweating, and a fine-fast pulse. What level is indicated?

In Traditional Chinese Medicine (TCM), the symptoms of low-grade fever, night sweats, and a fine-fast pulse provide crucial insights into the patient's condition. When analyzing these symptoms, they suggest an illness that is penetrating beyond the surface and affecting deeper bodily systems.

The presence of low-grade fever indicates that there is a heat pattern manifesting within the body, which typically occurs at a deeper level, such as the Blood level. Night sweats are a key symptom often associated with a deficiency in Yin or a pathogen affecting the interior, aligning with Blood level involvement since Blood has a vital role in nourishing Yin and stabilizing the body's internal environment.

The fine-fast pulse further supports this assessment, as a pulse that is fine and rapid generally reflects a situation where heat is present, often indicating a consumption of body fluids or the presence of internal heat that is affecting Blood. This can also be seen as a sign of Yin deficiency, which is linked closely to Blood dynamics in TCM.

Thus, the combination of night sweats, low-grade fever, and a fine-fast pulse indicates that the patient is experiencing an issue at the Blood level, where the regulation of heat and fluids becomes compromised due to various potential factors, such as a deficiency or a heat syndrome