Cosmetic Fillers FAQ

Should you use cosmetic fillers under your eyes?

Yes, fillers can be a great option for restoring volume under the eyes. However, some people overdo it. 

Using too much filler in this area can make the under-eyes appear swollen or alter the natural shape of your features in an unflattering way. A conservative amount, around 0.25 to 0.3 mL under each eye, is usually sufficient to improve hollowing and soften the tear troughs without overloading the tissue.

This treatment works best for individuals in their 30s who want a subtle refresh. For those in their 40s and beyond, where skin laxity becomes more of a concern, under-eye filler may need to be paired with other treatments for a more balanced outcome. Using high volumes of filler under the eyes can increase the risk of swelling, fluid retention, or even the Tyndall effect—a bluish tint under the skin.

We support the use of under-eye filler in the right patients, but always with restraint. In some cases, combining it with treatments like fat transfer may provide a more natural, longer-lasting result.

Can cosmetic filler be used to fill lines around the mouth?

Yes, it can, but technique and moderation matter. With careful placement and a conservative approach, it is possible to soften these lines without compromising your natural facial movement.

The lines around the mouth, including nasolabial folds, deepen with age as the cheeks descend and the fat pads shift downward. Even children have these folds, so their presence is not purely a sign of ageing.

When using filler here, it must be placed superficially and in very small amounts. It is best to inject perpendicular to the skin and target only the creased areas for subtle improvement without puffiness. Overfilling this region can cause the filler to spread, leading to an unnatural or overdone appearance.

How long do cosmetic fillers last?

Initially, it was believed that cosmetic fillers break down completely within 6 to 18 months. However, recent studies have shown that traces of filler can remain in the tissues for five to ten years, even if they are no longer visible on the surface. 

When more filler is added without properly assessing what is already there, it can gradually build up and affect the overall appearance. Over time, this accumulation can cause swelling, distortion, or even changes to the underlying facial structure. In some cases, it may also leave behind residual scar tissue.

To avoid this, we recommend spacing out treatments and focusing on maintaining balance, rather than continuously chasing volume. When it comes to fillers, more is not always better.

Do you suggest filler in the temple to lift the eyebrows?

We do not recommend using filler in the temples with the goal of lifting the brows. Eyebrow sagging is usually a symptom of broader facial laxity, and attempting to lift the brow by injecting volume into the temples is not anatomically sound.

In most cases, the amount of filler required to lift the area would leave a visible bulge and not deliver the desired lift. That said, mild temple hollowing can be treated with filler for aesthetic balance. 

Volume loss in this area is common and can cause the upper face to appear aged or gaunt. A small amount of carefully placed filler can reduce hollowness and help support nearby structures without altering the natural shape of the face.

Any correction in this region should be done conservatively, with the aim of softening shadows, not reshaping anatomy.

Where do you recommend getting fillers, and how often?

The areas most suitable for filler depend on your facial anatomy and where natural fat depletion occurs with age. Based on our clinical experience and known ageing patterns, here are common treatment areas:

• Temples: Restoring volume in the temples can soften hollowing and improve facial contour.
• Lower eyelids: Treating under-eye hollowing can reduce dark circles and create a fresher, more awake appearance.
• Upper eyelids: Subtle volume in this area can soften signs of ageing and balance eye shape.
• Lips: A filler is added to the lips to help replace lost volume, refine shape, or enhance symmetry.
• Pre-canine fossa (beside the nose): Treating this area can soften nasolabial folds and improve overall facial harmony.

Patients in their 30s to early 40s often see the best results from filler treatments, as their skin is still firm enough to support added volume.

 For individuals with more significant skin laxity—typically those in their mid-50s and above—filler alone may not be enough to achieve the desired effect. In these cases, combining filler with other treatments, such as skin tightening or surgical options, may deliver more effective and natural-looking results.

In addition, fillers do not need to be applied everywhere at once. Thoughtful placement and spacing between treatments ensure natural, gradual improvements without overfilling.

Can you use fillers to address the smile lines?

Smile lines, also known as laugh lines or marionette lines, form from repeated facial expressions and the natural ageing process. Everyone develops them eventually, and they are a normal part of how the face moves.

These lines become more pronounced as facial support weakens and tissues sag. If you gently lift your cheeks with your hands and notice the lines smooth out, that is a sign that volume loss and sagging are the main culprits, not movement alone.

Filler can help soften these lines, but only if applied with a very light hand. Lip filler placement must be superficial and based on the firmness of the surrounding tissue. Too much filler in this area can weigh down the mouth and disrupt the natural dynamics of your smile.

At Flawless Aesthetics, we believe true beauty lies in balance. With our approach to Parramatta cosmetic fillers, we focus on creating refinements that preserve natural movement while softening harsh shadows. Your face should still look like you, only fresher and more balanced, that's why we aim to enhance expression rather than erase it.