★★★★★
Infection
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I appreciate your tenacity!
I think charcoal would be a great thing to try. It may take some persistence on your part, but you seem to be well researched and persistent!
You could make small poultices (I would make a week's worth at a time and keep them in the refrigerator) and use them daily. One way to make poultices that aren't so bulky in the mouth are to empty a tea bag (or buy empty tea bags if you have a source for this, though really, it may be cheaper to just empty some.) and replace the tea with activated charcoal powder (about 1/4 or 1/2 teaspoon). Moisten and hold this in the affected area in your mouth. You could keep in in your mouth for an hour or two during the day, even a couple of times a day. Or, you could buy charcoal tablets (not capsules) and each night, put one against the area and let it sit between the gum and cheek all night. It will slowly dissolve. I have done this and still have remnants of the tablet in my mouth when I wake up in the morning. I would try this daily for at least a month. I have read about charcoal drawing out deep infections over quite a number of days. It can seem like nothing is happening for a while.
You could also continue with some of the other things you have tried at other times a day. You have tried several excellent remedies.
I look forward to hearing how this works for you.
~Mama to Many~
Infection
★★★★★