To be honest I think this affects such a spectrum of different people you cannot generalise like this. I got EC after a course of accutane. That is not psycological.
Also I am perfectly normal, have good friends, excellent family, excellent job and a great future. Psycologically I am perfectly fine and I have seen this clearly healing by leaving the lips to heal with time. I have seen layer after layer of skin slowly rebuild itself. This is not psycological it is simply the natural healing process of the body, like a scab on the knee when you fall over.