My dog got this after getting scratched by a cat he was chasing. It was horrible! The poor thing had a baseball sized swelling on his head.
The vet had to put her on three different antibiotics before the infection cleared. With each antibiotic, the swelling reduced and then returned. That was one stubborn infection!
I also put hot compresses on the swelling which helped the pus come to the top for it to be drained.
I wouldn't wish this infection on anyone, animal or human! It really is frustrating.