hi i have been suffering from a itchy rash for about one month now. I have red itchy bumps, kinda like mosquito bites that come and go. They very in size and last for about three days tops.Then all of a sudden a new bump appears.My doctor has diagnosed me with scabies,which i was prescribed peremethrin.After my second round of peremethrin i went back to my dr who now says she thinks i have MRSA. I was perscribed Bactrim. However, i dont have any painful or pus filled lesions.Just round red itchy spots..please help