Based on the characteristics and development rules of latent pathogen theory

this article summarized the academic thoughts and the drug administering characteristics from the treatment of hemorrhagic stroke with latent pathogen theory by Professor REN Jixue. Latent heat（fire）

latent phlegm

and latent blood stasis in internal damage of latent pathogen play an important role in the occurrence and development of hemorrhagic stroke. Three latent pathogens of phlegm

heat

and blood stasis are hiding in the brain

leading to the occurrence or recurrent attacks of the hemorrhagic stroke in case of other incentives. It was believed that the elimination of pathogens should through urination and stool. In the treatment of hemorrhagic stroke

Professor REN attaches great importance to give path for latent heat（fire） and phlegm

as well as elimination of latent blood stasis. For the methods and herbs of eliminating brain stasis

breaking up blood and resolving stasis

draining heat and awakening the mind

dissolving phlegm to open the orifices were proposed

and it was treated with modified Sanhua Tang（三化汤） or Didang Tang（抵挡汤）.