Anyone have an idea what this could be?

KD

I’m going to be calling her paediatrician first thing in the morning since they’re closed today but does anyone have any idea what this could be? It’s not bleeding or doesn’t have anything coming out of it? It’s at the back of her head. It must’ve just happened in the last couple of days since it’s been a couple of days since I’ve looked at the back of her head. It doesn’t

Seem to be bothering her either. She isn’t unusually fussy or crying!