Bi syndrome has a long history. It is first seen in ,Huangdi Neijing,. The etiology and pathogenesis of the disease are complex. Doctors of all ages have different opinions on this, and the treatment is quite different, but most of them are mainly to dispel wind, remove dampness and disperse cold. Huoxiang Zhengqi Powder (藿香正气散) comes from ,Taiping Huimin Heji Jufang,. It is a classic prescription for treating external cold and internal dampness. It is commonly used in gastrointestinal cold, dyspepsia and other diseases. Professor PENG Jiangyun, a famous doctor in Yunling, often uses Huoxiang Zhengqi Powder to treat rheumatoid arthritis, osteoarthritis and gout, which belong to cold dampness arthralgia syndrome and dampness heat arthralgia syndrome. Professor PENG believes that the key to the treatment of arthralgia of cold-dampness syndrome and damp-heat syndrome is to treat "dampness" , and the treatment of "dampness" lies in the treatment of "spleen" . Huoxiang Zhengqi Powder has the functions of relieving exterior dampness, regulating Qi and harmonizing the middle. The treatment of Bi syndrome can dispel exterior pathogenic factors and internal invigorate spleen and remove dampness, which can kill two birds with one stone. The curative effect is very good.