Firstly

phlegm retention and blood stasis are pathological changes and pathological products produced by metabolic disturbance of water and liquid and blood in human body

and modern medicine hold that the central link of inflammatory course is vascular response.Based on traditional theory of Chinese medicine

it can be seen that vascular inflammation of low degree certainly leads to phlegm retention and blood stasis.Secondly

based on microcosmic manifestation

vascular inflammation of low degree belongs to category of phlegm retention and blood stasis in TCM.Thirdly

according to syndrome differentiation of a series of clinical manifestations at latter stage

inflammation of low degree is exactly belong to phlegm retention and blood stasis. Therefore

it is held that phlegm retention and blood stasis are main pathological products of inflammation of low degree.Because phlegm retention is related with blood stasis

phlegm retention can induces blood stasis and blood stasis can causes phlegm retention

so phlegm retention and blood stasis interlink

leading to syndromes of both phlegm retention and blood stasis.Thus

interlinking of phlegm retention and blood stasis is basic pathological characteristics of inflammation of low degree.