Chai Hu Gui Zhi Tang for Rheumatic Polymyalgia Rheumatic polymyalgia is a group of clinical syndromes that manifest as pain and stiffness in the muscles of the neck, scapular girdle, and pelvic girdle, usually accompanied by systemic reactions such as increased blood sedimentation. The onset of the disease is above the age of fifty, and the incidence has been on the rise in recent years. The conventional application of small doses of hormone therapy, but the course of treatment is long, the application of the elderly side effects, and the process of hormone withdrawal and reduction of the disease is easy to recur. Therefore, Chinese medicine treatment has a very good advantage. This disease belongs to the category of paralysis in Chinese medicine. The cause and mechanism of the disease are often due to the deficiency of positive energy, the body does not take care of the external guard, and wind, cold and dampness invade the body, resulting in unfavorable meridians and poor flow of qi and blood in the meridians. Therefore, the classic formula in the Treatise on Typhoid Fever, Chai Hu Gui Zhi Tang with addition and subtraction, is chosen. Article 146 of the “Treatise on Typhoid Fever”: If a person has typhoid fever for six or seven days, has fever, slight vomiting, slight vomiting, and knots under the heart, and the external evidence has not gone, Chai Hu Gui Zhi Tang is used. This formula is a classic formula for the treatment of Tai Shao’s disease, but later medical practitioners have greatly expanded the application of this formula and achieved excellent results, such as treating recurrent colds, acute pancreatitis, acute and chronic gastroenteritis, insomnia and depression, cervical spondylosis, and so on. This formula has been applied to treat rheumatic polymyalgia with remarkable efficacy based on the application of this formula for shoulder coagulation by the late Professor Wang Dajing, a famous veteran Chinese medicine practitioner of our hospital. This formula is a combination of half of Xiao Chai Hu Tang and half of Gui Zhi Tang. Xiao Chai Hu Tang is a representative formula for Shao Yang meridians. Its ruler, Chai Hu, can disperse the evil of Shao Yang; the minister, Huang Qin, can clear the fire of Shao Yang; the adjuvant, Han Xia, can harmonize the stomach and subdue rebelliousness, eliminate lumpiness and disperse nodules; ginseng and licorice can benefit the stomach and produce fluid to harmonize the Ying and Wei; ginger and jujube can support the righteousness and dispel evil, and strengthen the lining to prevent evil from entering. It can reconcile Shaoyang and regulate Qi, and at the same time target the shoulder and arm pain caused by unfavorable Qi of Shaoyang meridian. This formula is based on the formula of the treatise on typhoid fever. This formula is also a representative formula of the Chinese harmonizer in the Treatise on Typhoid Fever, which can harmonize Ying and Wei, harmonize Yin and Yang, and at the same time target the strong pain in the collar and back caused by adverse Qi in the Sun meridian. The combined use of the two formulae can regulate both qi and blood, so that yin and yang are balanced, yin is calm, yang is secret and the spirit is even, and qi moves and blood flows smoothly, then the paralysis will be cleared. Meanwhile, laboratory research shows that both Xiao Chai Hu Tang and Gui Zhi Tang have immunomodulatory effects, and the combination of the two formulae has a synergistic and superimposed effect. The combination of the two formulae has a synergistic and superimposed effect. Moreover, Chai Hu, Gui Zhi, Scutellaria, Bai Shao and Licorice in the formula have obvious anti-inflammatory and analgesic effects, so the treatment of rheumatic polymyalgia can achieve very good results.