Novel coronavirus pneumonia（COVID-19）

first found at the end of 2019

is highly contagious and has a high mortality rate

with no specific drugs currently. Traditional Chinese medicine（TCM） has achieved certain results in identifying and treating this disease. Based on the theory in Inner Canon of Yellow Emperor（《黄帝内经》）

combined with the theory of febrile disease

it is believed that the cause of COVID-19 is dampness toxin. The internal and external dampness pathogens have identical qi

affect each other

and assemble to become toxins. After combining with epidemic toxins

it can follow cold transformation or heat transformation. According to COVID-19 patients clinical symptoms mainly involving pulmonary system and spleen and stomach system

and combining theories such as five evolutive phases and six climatic factors

it is believed that the location of disease is lung and spleen. Main pathogenesis is dampness toxin obstructing the body and disorder of qi movement. Pathogenic characteristics are dampness

heat

toxin

stasis

and deficiency. In severely ill patients

the deeper the heat

the severer the reversal coldness. Static blood obstructs collateral

lung fails in dispersing and purifying

prolonged illness affects kidney

and the characteristics of heat

stasis and deficiency are more distinct.