Welcome To HealthcareMagic forum,
I would like to know few things here.
1) Are the blisters water filled(vesicles).
2) Is it on one side of the face.
3) Are the blisters over lips only and are bilateral .
4) Is it associated with fever or stress
Your primary history goes towards HEPES LABIALIS OR HERPES
ZOSTER(depends on location of blisters).Along with antibiotics you also need a course of anti viral medicines like acyclovir
or valacyclovir .Your exact diagnosis would also decide the dose of anti viral medicine required.
In such cases you should start the medicine as soon as possible .So consult a dermatologist
who would be the best person to diagnose your condition and start your treatment .
If you can answer my above questions then I'll be happy to guide you further.