Objective:To observe the clinical efficacy of Chaihu Shengjiang San(柴胡升降散)on subacute thyroiditis.Methods:108 patients were divided into the treatment group and control group,54 cases in each.The control group was treated with prednisone tablets.The treatment group was treated with Chaihu Shengjiang San,for 8 weeks.The clinical efficacy,TCM syndromes scores,inflammatory indexes,thyroid function index,lump size changes and adverse reaction in two groups were observed.Follow up for six months after withdrawal,the recurrence rate and the inci...