The elderly man’s eyes were already opened wide to its extreme and even his beard violently shook: “That’s right…. That’s right! What you said was absolutely true! This old man indeed was bitten by a red colored snake two years ago and this old man had thought that was just an ordinary Red String Snake…. My leg’s ailment also indeed started one year ago. I used Yang-attributed items and recuperated for a year, but it didn’t alleviate in the slightest. A genius doctor, truly a genius doctor!!!”
(TL: In case anyone is confused on all these Yang stuff, basically Yang stands for “Warm”, vice versa for Yin. This old dude thought that his leg’s symptoms were caused by wind chills and humidity, so he tried using “Yang/Warm” stuff. But the poison was “Yang” in the first place, so it ended up making it worse.)