《说文》中有一组字如“疢、癎、瘈、疴、疵”等,都是用“病”字来训释的,足见这类疾病(或与疾病相关的内容)在秦汉乃至更早的时代已为人们所认识。而由于年代久远,《说文》的训释又过于简略,这些字代表的实际内容以及它们之间的相互关系,有不少已经不明, There are a group of words in “Shuo Wen” such as “疢, 癎, 瘈, 疴, 疵 ” and so on, which are all interpreted with the word “disease”, which shows that such diseases (or disease- In the Qin and Han dynasties and even earlier times have been recognized by people. However, because of the passage of time, the explanation of the “Shuo Wen” is too brief. The actual contents of the representations of these words and the interrelationships between them are quite unknown.