I developed a rash during the 3rd or 4th month of Interferon treatment. My dermatologist prescribed a lotion, which helps a bit, but I continue to get new break-outs on my back and stomach. There are even a few spots on my arms and legs. It is a side effect of the drug, and is listed on the Interferon package insert. I've also experienced hair loss, fatigue, metalic taste in my mouth, dizziness, nausea ... pretty much every side effect. However, I am finished the first 6 months of treatment (halfway there) and I'm counting the months until the treatment is complete.