After studying 20 sorts of referance materials including Hwangjenaegyung which discuss the causes and symptoms of SymRo the researcher has been led to the following conclusions ; 1. In the reference materials, Hyulmakhuso (血脈虛少) is listed as the first potential cause of Sim Ro. Gokwoonsingi (曲運神機) is listed as the second potential cause. 2. Holholhemang (忽忽惠忘) is listed as the most obvious symptom of Sim Ro. Kunaesangchang (口內生瘡) is listed as the second obvious symptom.