This may or may not be useful ... but years ago I had tetanus and could barely stand, so I didn't brush my teeth. I got a horrible infection around one of my dental implants. The pain was excruciating. The swelling was so bad it affected my vision.

I didn't have money for a doctor or dentist. So, I tried vitamin C. I took quite a lot, I forget how much... probably something like three or four of the 250mg tablets a few times an hour for several hours on end.

The swelling decreased.

In a day the pain was vastly less.

I've still got the bad implants because my Medicaid won't pay for removal because they are implants. The infection doesn't appear to count. (I live in New Mexico where savings like this are essential, and the state used $20M to help Iron Man II be made... Yes, I don't approve.)

So, I'm still using vitamin C to keep the infection under control, and this is more than 5 years later.