How can i do for my lip?

About a year ago i had broken (chapped) lips and I used a tooth brush one time to brush off the skin. Unfortunately it tore my lip skin and i had a bruise on my lip. I didn't notice until now but i find my self ''nipping' on the spot(that had the bruise) of my lip sometimes; then occasionally i would bite a small piece of the skin off. Recently i've noticed that the spot that i continuously nip developed some skin which is harder than the other spots and it is less responsive to the prick of a needle. When i nip it now, the spot turns white and the skin looks like a boil and it feels tough on my tongue. I umed that a scar developed. I've tried petroleum jelly and lip balm to help it but it wont work. Currently i'm using skin therapy(scar reducer) to help with it.....Does anyone understand my condition? Can you please recommend something that i could use for my lip or should i see a dermatologist? Cuz' where i live it's hard to communicate with a dermatologist(Guyana SA).....MANY THANKS!! :)