how do i live with a permanent disfigurement

my thumbnail on my right hand, is deformed looking and has grown back mostly with skin covering not nail, as i used to bite my nail off due to bad nervous problems, so it's my own fault really....but i was always vain and this disfigurement makes me down at times, as nothing can be done cosmetically to fix it, i don't think..

anyone else have a permanent disfigurement?