Research of discrimination of internal injury from external by Lee Dong-won from medical historical point of view

이동원(李東垣) 내외상변(內外傷辨)의 의사학적(醫史學的) 고찰(考察)

Lee Dong-won based on the machanism of internal disease founded on Umhwa and Wonki in discriminating internal injury from external. His general idea of discrimination of internal injury from external could be thought as an reinterpretation of the concept from "Neijing", to Triple heater Wonki and ascending and descending of stomach qi. He distinguished between Yin disease and Yang disease and classified into internal and external injury. "Insufficiency of yang brings about cold syndrome." and "An excess of yang brings about heat syndrome." are considered as external infection, and "Insufficiency of yin brings about heat syndrome." and "An excess of yin brings about cold syndrome." as internal injury.