Terminologies of symptoms in Chinese medicine were multifarious and complex. Many symptoms appeared in pairs, so the author proposed a new concept ＂ coupled symptoms＂. Coupled symptoms was defined as symptoms or signs appeared simultaneously in pairs at some stage of dis- ease. ＂Simultaneous＂ ,＂related＂ and ＂independent＂ were the basic features of coupled symptoms. In addi- tion, some confusions in coupled symptoms were summarized, and significance of ＂coupled symptoms＂...
