Hyaluronidase works how quickly on filler?
Haute Living puts the first visible change at 30 to 60 minutes: "Visible dissolution begins within 30-60 minutes." The clock starts from the first minutes, not the first days.
The full course
The same guide says: "Results are visible within hours and complete within 24-48 hours." Put together, it gives a first visible change in minutes and a finished result in a day or two.
Studies on filler problems
For research on what goes wrong with filler, see the PMC papers The Demographics of Patients With Dermal Filler Complications and Complications of Dermal Injectables, a Retrospective Study.
Timing your own check
Note the time of your visit so the first hour is easy to track. Readers in St. Johns, Florida, who see nothing change after a day or two can tell their provider.