This article summarized SONG Yiting′s experience in diagnosis and treatment of chest Bi syndrome. It is believed that "pathogens invade when the body is weak" and "a variety of pathogens gather in chest" are main pathogenesis of chest Bi syndrome with wind-cold obstruction. The syndrome is differentiated mainly with the help of the characteristics of symptoms and the inquiry of medical history. Affected by the geographical factors

such patients are more common seen in Inner Mongolia area. For treatment

SONG advises to combine the unblocking and supplementing methods together. The main principles are warming

unblocking

dispersing and dissipating; warming and unblocking with acrid-heat; removing wind and unblocking the collaterals; and dispersing stasis and relieving pain. In clinical practice

Mahuang Fuzi Xixin Decoction（麻黄附子细辛汤） is often used as a basis recipe to warm yang and diffuse Bi; and herbs with unblocking and supplementing function

insect drugs

and herbs to promote qi and blood circulation are commonly added to.