I too am bothered with a skin type deal. I have tried 3 different antibiotics and the last was Zpak which is supposed to work in the body for 5 days or so after takiing. Not sure if it did but I am looking somewhat better. At first my dr. did take a culture and said I had 2 staph infedtions fighting each other but I'm still not real sure about that. I do still have marks on mh skin. Almost looks like bites and theey do take a long time to heal. Let me know what kind of rrash you have. Ok?