For example, the heart opens into the tongue and is related with the small intestine internally and externally. So, oral erosion (ulcerative stomatitis) may be clinically treated by clearing away the fire from the hear or small intestine.

例如，心开窍于舌，心与小肠相表里，所以可用清心火或泻小肠火的方法治疗口舌糜烂。