Most acute oral and facial infections (viral, bacterial or fungal) would be expected to fully resolve within 7 to 14 days.

In some instances (some viral infections) this will be spontaneous without active treatment directed at the infecting organism. In most cases an antibacterial or antifungal agent will be used.

Generally speaking, an anti-infective agent, if effective in that infection will have a noticeable effect within 24 to 48 hours. If not, it is probably not doing all it needs to, either because it is not active against that infecting organism or because the active infection is walled off in an abscess which needs to be actively drained. Drainage is instantly effective, and usually within a few hours signs and symptoms improve unless there is progress into full blown sepsis.

Chronic infections, however, by their very nature are completely unpredictable in terms of describing a timeline to resolution. So once again: speak to your treating clinician.