Blood blister on 6-week scar after mole removal. (photo)

Mole removal scar is healing nicely for 6 weeks post-op, but a blood blister developed on the spot that's been experiencing a sharp poking pain from a suture that still hasn't dissolved. At a follow up appointment today I was told it's fine and to not pop it, but while washing my face this evening it popped and quite a bit of blood and some white stuff (whitehead? pus?) came out. What should I do to help this heal? That spot is quite tender.