|Rare--but do your research|
Also--I have seen some examples of unfortunate uses of these techniques.
Now, in an article in Plastic and Reconstructive Surgery, the official mag of the American Society of Plastic Surgeons, some researchers from the Dallas Plastic surgery Institute wrote about some facial "danger zones" docs should take into consideration in shooting in fillers.
Soft tissue dermal fillers can reduce lines and wrinkles and present a younger, fuller appearance. Recovery time is short. Fillers are now second only to botox in popularity. In 2016, 2.8 million filler procedures were performed.
But--whoever does this (and it's not just plastic surgeons anymore), that doctor needs to avoid injecting into or damaging blood vessels. Partly for this reason, the doctors who wrote the article often prefer hyaluronic acid where possible--these can be reversed with a rescue injection.
The researcher say there are six danger zones on the face, from forehead to chin.
In the article is a link to a video showing how to handle each danger zone.
Might be worth discussing with your doctor before you pump up the facial features.