The mechanism of fever due to internal injury is complicated. Different fever types have their own characteristics. According to the connotation of "Yang excessiveness causing heat"in Inner Canon of Yellow Emperor（ 黄帝内经）

the authors think that all fever may be caused by Yang-qi relatively excessive and heat stagnation in the interior

which means fever due to internal injury is from Qi stagnation. Discussing from the three types（ high fever

tidal fever and mild fever） of fever due to internal injury

the authors make textual criticism on the sources of cause

pathogenesis and treatment

clarify the development of fever due to internal injury

as well as explore the explanation and treating thoughts of physicians in different times on the pathogenesis of fever due to internal injury

in order to enhance clinical effect.