Yes I really think that it's my case too. As I say, I was used to bit and pull my lips out, but during a period, I had no 'crusts' at all, that's why I trully think that all began with the using of products -also considering that I maybe passed over the pulling out limit-, a commercial chapstick first.
Then, a vicious circle became established, which spreads a lot when I decided to consult a first dermatologist in order to have a judgement and then, all got out of hand.
Our problem had not been tackled with reflection and smartness from dermatologists, at all, which damaged even more our lips and drove us crazy.
We just should have been patient and do not interact our lips with any products, but our mind had been really affected by these dermatologists, with who we fastly disenchanted.