Chronic Mouth Swelling - need advice

[Daybreaker]

Not sure if this is even possible in snakes, but it seems as if your BP is allergic to antibiotics. Swelling after giving medication is often a sign of that in other animals.

Could be, though a day or so after her injections the swelling would go down a lot. It's just odd that it keeps coming back, unless it's just not getting "cured" anyway.

Does it look something like this? (URL)

Very similar, though my snake's swelling was concentrated on one side (well the last time it re-swelled it started going onto the other side as well).