My story is very, very similar to Healing2021's but there were so many other factors, including mercury filling removal, terrible diet, severe anxiety and depression, and alcohol and marijuana abuse, that I like to call it a "perfect storm."
I was a lip biter for many years before having chronic EC (I did not have chronic dry lips however, but definitely a tendency toward chapping), but I can remember the time before I got EC, I really bit them, made them raw and didn't stop for over a month. Then like I've said things got slightly better before getting much worse with lip balms, Vaseline at the dentists' and Aquaphor after that. Thank God I never tried steroids or Protopic, since I never bothered seeing a dermatologist after reading the experiences on this forum.
Sure I might consider a dermatologist some day, but only one who has seen the condition before (one that is unrelated to Accutane or contact dermatitis) and has personally cured it for their patient.