I had an abscess for a very long time, it was there so long it stopped hurting. The blister just became something I got used to as I was deciding what to do with that tooth. I was unaware of the dangers they can pose at the time, and the infection they carry.
Anyway, I was taking large amounts of raw garlic for a parasite infection, and after I was better, I realized the garlic, being a powerful natural antibiotic, had cleared the abscess also. I took it for 2.5 mos, but I'm not sure at what point it cleared the infection.
I never did this, and it might burn, but I wonder if applying raw garlic directly to the infected area would help? I rubbed raw garlic on a lump on my dogs back, it was gone in a week. Garlic is amazing, too bad it makes you smell so bad.