Xiakucao Oral Liquid is a commonly used proprietary Chinese medicine included in the 2010 and 2015 edition of Chinese Pharmacopoeia (part I). It is a preparation of Prunellae Spica made by extraction and concentration through modern technology, with the functions of clearing fire, dispersing nodules and swelling and so on. The Clinical Application Guide of Proprietary Chinese Medicine·Surgical Diseases Fascicule organized and compiled by the Surgery Branch of China Association of Chinese Medicine recommends Xiakucao Oral Liquid to treat thyroid diseases. Chinese Medicine Diagnosis and Treatment Scheme of Gall Pain (subacute thyroiditis) issued by the State Administration of Traditional Chinese Medicine in 2017 (trial version) recommended Xiakucao Oral Liquid for the treatment of gall pain (subacute thyroiditis). However, there are still some problems in clinical application of Xiakucao Oral Liquid. In order to standardize the clinical use of Xiakucao Oral Liquid in the treatment of thyroid diseases and make more patients with thyroid diseases benefit from it, this expert consensus (exposure draft) is hereby formulated based on the existing clinical research results and combined with the previous experience of clinical experts in the treatment of thyroid diseases.