So the mysterious rash that I contracted has officially healed. The Chinese medicine worked like a charm!
HOWEVER, the latest development is the fact that Jianjuan (my roommate) now has the SAME RASH on the back of her neck! It looks identical to what I had, and she said it itches terribly and has spread significantly in the past 48 hours. This rash has turned into our own sort of plague! Looks like our apartment is in desperate need of being sterilized from top to bottom...