There are multiple different types of fillers and whilst some are permanent, most are temporary. Injectable fillers tend to be synonymous with collagen injections however whilst collagen was used to restore volume, technology has now improved.
We now use a substance called Hyaluronic acid (tradename Juvederm) which is a naturally occurring complex molecule within the body. The most common uses are in the areas of the lips, cheeks, nasolabial folds and marionette lines.
It is designed to enhance natural fullness or to subtly soften the signs of ageing. Hyaluronic acid combines with water to cause its enhancement in volume and comes with an inbuilt local anaesthetic to reduce the pain of injection. The injections are more painful than botox and can be done under a local nerve block. The effects typically lasts 12-18 months and longer in the periorbital region. It will need to be repeated and comes in dosages of 1 ml per vial. The most common side effects are red or tender injections sites, swelling, and bruising. Any tiny irregularities can be massaged out.