Had a re-occuring back moler - pre-existing tooth/bone infection and in the 9th hour before going to the ER thought I'd give this a try:
Steeped fresh oregano plant from a friends garden and chopped fresh organic lemons (with peels- important) and let both steep (do not boil) together for :30 mins - and swished in mouth every 15-30 mins, then consumed - repeat during waking hours for at least 5 days.
Amazingly, the very severe pain subsided instantly! The medium inflammation reduced daily. It's important to continue applications for 5 days or longer- as needed, even though symptoms are relieved.