Esoteric Meanings of the Grotto Heavens, Vol. 4

The original title is Dongtian Aozhi. In Chinese tradition, "Grotto-Heavens" refers to sacred, hidden sites where immortals dwell. By using this term, the author, the renowned Qing Dynasty physician Chen Shiduo, suggests that the medical knowledge within is both profound and life-giving, as if revealed by divine sources. This specific work is a famous treatise focusing on external medicine, including the treatment of sores, ulcers, and surgical conditions.