It will fill back in again. My edges are my weak spot though. I don't know if it was the pregnancy shedding that started the problem but that's when I started worrying about my edges. Not looking forward to it this time around at all. I plan to keep my hair braided up.
You have to cover them up with the headband. For me sometimes I'd just cover them up and try to forget the problem for a while. It's probably more noticeable to you.