For those wondering how long it takes for dermal fillers to settle and achieve their desired aesthetic, the process typically spans about two weeks. While initial effects are visible sooner, the two-week mark is crucial for the filler to fully integrate, soften, and reveal the final, harmonious outcome.

In the initial 48-72 hours after injection, the filler absorbs water within the tissue, showing an immediate, preliminary treatment effect. However, for a distinct and optimal tissue-lifting result, approximately two weeks are needed for the filler to stabilize. This timeframe also serves as an ideal point to assess if a touch-up injection is necessary or if the desired outcome has been achieved.

During the first 72 hours post-injection, the treated area may experience pain, mild swelling, or bruising. Some individuals also report a feeling of tightness or discomfort at the injection site. These are common and temporary side effects. From day four to day 7, swelling and bruising typically begin to subside significantly. The filler gradually integrates with surrounding tissues, and reduced swelling allows for clearer definition of the treated area.

Between day 7 and day 14, most signs of swelling or bruising usually disappear. The filler continues to integrate well with the tissue, leading to a noticeable improvement in aesthetic results.

Dr. Hong advises on different types of fillers before injection. Illustration: Tam Anh General Hospital

After two weeks, the filler is considered stable. At this stage, the filler has blended with the surrounding tissue, eliminating any sensation of hardness or lumps, and the face achieves a more harmonious and natural appearance. This is also the appropriate time to accurately evaluate the final result of the procedure.

Several factors influence the stabilization period of fillers. The type of filler used plays a significant role, as each product possesses different degrees of firmness, viscosity, and water absorption capabilities, leading to varying stabilization times. Hyaluronic acid (HA) fillers are widely used today due to their high tissue compatibility. In contrast, long-lasting fillers like silicone or PMMA have distinct properties and are more challenging to manage if intervention is required. It is important to note that silicone has been banned for cosmetic use by the U.S. Food and Drug Administration (FDA) and the Vietnam Ministry of Health.

The injection site also impacts the stabilization process. Areas with frequent movement, such as the lips, may require more time for the filler to adapt compared to less mobile areas like the cheeks or chin. Proper injection technique is crucial; filler must be placed in the correct layer appropriate for the treatment area and the filler's firmness. When injected correctly, filler stabilizes at the site and achieves the intended treatment effect, reducing unwanted side effects such as swelling, bruising, lumpiness, or uneven distribution.

Additionally, individual factors like the degree of skin aging and the body's natural response can affect filler stability. Adhering to post-injection care instructions is essential to prevent filler migration from the injection site and minimize the risk of swelling and bruising.

To ensure proper filler stabilization, it is vital to follow your doctor's aftercare guidelines. In the initial days, avoid intense exercise, limit massage, and refrain from applying strong pressure to the injected area. Avoid using products containing strong chemical exfoliants for about three to five days after the procedure. Furthermore, maintaining adequate sleep and a relaxed state of mind can support the body's natural recovery process.

Choosing an unreputable or unlicensed facility, having the procedure performed by untrained individuals, using unverified products, or failing to follow post-filler care instructions can increase the risk of complications. Avoid rushing for immediate results, and refrain from frequently touching or manipulating the injected area before the filler has stabilized.

If you experience any unusual signs, such as prolonged swelling, severe pain, redness, or other abnormal symptoms, contact your doctor immediately for assessment and timely management.

Dr. Dam Thi Thuy Hong

Head of Aesthetics Department

Tam Anh General Hospital Hanoi