Why one syringe, then wait
Hyaluronic acid filler draws water. A syringe placed today is at perhaps seventy per cent of its final volume, and it keeps integrating for two weeks. Judging the result on day three and adding more is how people end up with a face that is correct on the day and overfilled a fortnight later.
So: one syringe, two weeks, then look. It is slower, it costs less, and it is the single largest difference between practices whose patients look well and practices whose patients look filled.
What filler is actually for
Volume, not lines. A line etched into skin by twenty years of expression is a skin-quality problem and belongs to microneedling or resurfacing. Filler injected under it will lift it slightly and, in the wrong hands, produce a smooth face that still looks tired.
What filler does exceptionally well is replace the fat pad volume that leaves the midface from about thirty-five onward. That is why the cheek is the most under-requested and most transformative area on this list, and why a good result there often makes the thing you actually came in about disappear.
The tear trough
Worth being plain. It has the highest complication rate of any routine filler site: the skin is thin, the vasculature is unforgiving, and product placed too superficially produces a persistent blue-grey shadow that lasts years unless it is dissolved.
We do it with a cannula, on suitable anatomy, and we decline it perhaps half the time. Volume loss in the cheek is very often the actual cause of a hollow under the eye, and treating the cheek fixes it without going near the area.