Under-eye filler is generally safe when performed by a skilled, qualified injector, but it carries more risk than filler in most other facial areas. The skin beneath the eyes is exceptionally thin, the underlying blood vessels are dense, and the margin for error is small. As of September 2023, only one filler product has received FDA approval specifically for the under-eye area, meaning most under-eye filler treatments are technically off-label uses of products approved for other parts of the face.
FDA Approval and What It Means
For years, every under-eye filler injection was an off-label procedure. That changed in September 2023 when the FDA approved Belotero Balance (+) specifically for improving infraorbital hollowing, the sunken or shadowed appearance beneath the eyes, in adults over 21. In the clinical trial supporting that approval, 144 participants needed one or two treatment sessions to achieve their best result, and the effects lasted up to 48 weeks.
This approval matters because it means at least one product has been formally studied and vetted for this exact use. Other hyaluronic acid fillers are still used under the eyes regularly, but without that same level of regulatory scrutiny for the tear trough area specifically. If safety is your top concern, asking your injector whether they use the FDA-approved product is a reasonable starting point.
Why the Under-Eye Area Is Higher Risk
The infraorbital region sits above a web of small arteries and important nerve structures. Injectors have to navigate around the infraorbital nerve bundle on the inner side and the zygomaticofacial nerve on the outer side. A misplaced injection near these vessels can, in rare cases, block blood flow and cause tissue damage or even vision changes. This is the most serious potential complication and the primary reason the under-eye area demands a highly experienced injector.
The skin here is also thinner than almost anywhere else on the face. That means filler placed even slightly too close to the surface can become visible or create a bluish discoloration called the Tyndall effect, where light refracts off the product sitting just beneath the skin. This isn’t dangerous, but it’s a cosmetic problem that defeats the purpose of the treatment.
Common Side Effects and Recovery Timeline
Bruising and swelling are the most predictable side effects. Swelling peaks within the first 24 to 48 hours, then gradually subsides. By days three through five, the puffiness starts to improve noticeably. Most bruising and swelling resolve within 7 to 10 days, and by the two-week mark, the filler has typically settled into its final position. That’s when you can judge the actual result.
There’s one side effect that catches many patients off guard: prolonged puffiness. One retrospective study found that nearly 25 percent of patients developed lasting swelling in the under-eye area (called malar edema) that persisted for an average of 5.4 months after injection. This is more common with certain hyaluronic acid fillers that attract a lot of water to the area. Practitioners sometimes mistake this fluid buildup for uneven filler placement and add more product, which can make the problem worse.
Who Should Avoid Under-Eye Filler
Not everyone is a good candidate, and a responsible injector will tell you so. The likelihood of complications increases based on several patient-specific factors: age, lifestyle, existing medical conditions, and any pre-existing issues with fluid drainage in the face. People who already have puffiness, fluid retention, or malar bags beneath their eyes are more likely to develop prolonged swelling after filler. In these cases, filler can actually worsen the appearance rather than improve it.
If your main concern is puffiness rather than hollowness, filler is likely the wrong treatment. The ideal candidate has visible hollowing or shadowing beneath the eyes with relatively firm skin and no tendency toward under-eye bags.
Filler Migration Over Time
One of the most common concerns people raise is whether filler moves from where it was originally placed. Formal research is still catching up to this question. Clinical trials are now using high-resolution MRI and ultrasound imaging to track whether filler migrates away from the injection site over periods of 12 to 24 weeks. The fact that this research is only now being conducted reflects how recently the question has been taken seriously in clinical settings.
Anecdotally, many practitioners report that filler can spread or shift in the under-eye area over months or years, contributing to a puffy or unnatural look. The under-eye region is particularly susceptible because the tissue is loose and mobile, and the repeated motion of blinking may encourage product displacement. This is one reason many injectors now recommend smaller volumes and more conservative treatment plans for this area.
Reversibility Isn’t Always Simple
One of the main selling points of hyaluronic acid filler is that it can be dissolved with an enzyme called hyaluronidase if something goes wrong. This is true, but the reversal process doesn’t always go smoothly. In a study published in Plastic & Reconstructive Surgery, outcomes after hyaluronidase dissolution broke down like this: 59 percent of patients had a satisfactory result, 24 percent needed additional dissolving sessions because the first wasn’t enough, and 18 percent experienced what researchers called “posthyaluronidase syndrome,” meaning their face looked worse after dissolution than before, with hollowing, loss of skin elasticity, or skin discoloration.
The risk of this poor outcome increased significantly with two factors: how much filler had been injected in total and how long the filler had been in place. Patients who developed posthyaluronidase syndrome had a median of 3 mL of filler in their face, compared to just 1 mL in those with better outcomes. The concentration or dose of the dissolving enzyme itself didn’t affect the outcome, suggesting the problem is related to what years of filler do to the surrounding tissue rather than the reversal process itself. This is an important consideration for anyone planning to “just dissolve it” if they don’t like the result after multiple sessions over several years.
Choosing a Qualified Injector
The single biggest factor in whether under-eye filler is safe for you is who performs the injection. The American Society of Plastic Surgeons notes that a skilled injector will know when to use a blunt-tipped cannula versus a sharp needle based on the treatment area. For the under-eye region, many experienced practitioners prefer a cannula because it’s less likely to puncture blood vessels, reducing the risk of both bruising and the rare but serious vascular complications.
Look for a board-certified dermatologist, oculoplastic surgeon, or plastic surgeon with specific experience in tear trough injections. General training in filler injection is not the same as expertise in this particular area. Ask how many under-eye treatments they perform, what product they use, and what their complication rate looks like. A practitioner who turns some patients away because they’re not good candidates is generally a safer choice than one who treats everyone who walks in.
What Realistic Results Look Like
When the procedure goes well, results typically last 9 to 12 months. The improvement is usually subtle: a softening of the shadow beneath the eyes rather than a dramatic transformation. Expecting filler to fix dark circles caused by visible veins or pigmentation will lead to disappointment, since filler addresses volume loss, not discoloration.
The safest approach is a conservative first treatment with a small volume of filler, followed by a reassessment at two weeks once swelling has resolved. Adding more product later is always possible. Removing excess product, as the dissolution data shows, is a less predictable process.