What's happening with my boob

[B00bissue]

Name changed as this is very outing.
6 weeks ago I got bit on my boob (by a human) a small amount went through the skin (about size of a 10p) and a bruise.
I got an infection and it took about3 weeks to clear up with the same amount of antibiotics but I had a large red mark still that was scarring.
3 days ago the scar tissue started to bubble almost like a blister. Last night it burst and it's sore and red again.
I contacted drs and they said they'd gibe antibiotics because of the risk of infection but looking at the picture it's not infected at the moment.
I just want to know why it blistered like that. Any ideas? And will it be susceptible to that happening again?

Chances are it was simply an infection (the human mouth is disgusting!), particularly if it was a child's, as (depending on the child, and age), they eat anything.

Could also be an allergy... say you have a nut allergy and they just had a peanut butter sandwich?

...or vampire bite.

If it's not vampire bite I'm going to be disappointed!
What I don't understand is it had been healed for a few weeks and now that happened. Back to antibiotics (and thrush) !