Which symptom characterizes the Wei (Defensive) Level?

The symptom that characterizes the Wei (Defensive) Level is chills. In Traditional Chinese Medicine (TCM), the Wei level is associated with the body's defensive Qi, which plays a vital role in protecting against external pathogens, particularly in the case of invasion by wind-cold or wind-heat.

Chills are indicative of the body's response to these external influences, suggesting that the defensive Qi is reacting to the pathogen. In the context of a Wei level condition, you may also see accompanying symptoms such as fever, as the body attempts to expel the invading factor. However, chills are a hallmark feature because they signify a deficiency in the ability of the body's defenses to keep warm in the face of an external threat.

This understanding is rooted in TCM theories about how the body responds to pathogens and the nature of different expressions of illness, where defensive reactions can lead to symptoms that reflect how the body is coping with an external disturbance. In contrast, symptoms like high fever, excessive thirst, and abdominal distension are associated with other levels or conditions in TCM, where the body's internal environment is considered more than just the defensive response.