Normally my lower lip was affected, most of it. It seemed to start in one corner and then as it worsened it covered the whole lip. I had areas that were very red and sore. The top lip had only a few spots that seemed affected but those came and went. The steroid cream would improve the inflammation but it would always come back once I stopped using the cream. I had EC for more than a year. Another factor, that may have caused me to get EC was that I moved from a humid environment back to my home town which was much more dry. My dermatologist did say that moving from such different environments could have caused the EC. It also did show improvement when the summer came about, as it is much more humid in the summer where I live. I hope this helps. I know how much of an annoyance having EC can be!