Two nights ago, I went to bed and felt some pain in my leg, in the crease of my right knee. I woke up the next morning to find a rash there. I have absolutely no idea how it developed. I went to an urgent care facility and had it looked at, and was prescribed doxycycline and bactroban ointment. I've been taking both, as well as soaking it in Epsom Salt and warm water, but it has gotten worse. It very painful. I've attached a picture of what it looks like, I'm going to see if I can attach one of what it looked like yesterday. Should I go to the ER to have this looked at?