Inter-transformation of Yin and Yang
阴阳转化yīn yáng zhuǎn huà · Yin-Yang
Under certain conditions Yin can transform into Yang and Yang into Yin, usually when a process reaches its extreme. Clinically this explains sudden reversals such as a high fever (Yang) collapsing into cold shock (Yin).
For education only — not medical advice. Consult a qualified practitioner.