“Blister on my cheek from photofacial”

I did my first photofacial with my dermatologist in Dallas, Tx. Actually it went great except I had one area on my cheek develop a hugh blister. It filled with a lot of fluid. The blister was the size of at least a half dollar coin.

Next morning I called, and she put me on bactroban ointment, keeping covered with saran wrap to prevent infection.

Just how long should this area take to heal? It's really large and red. Will it scar?