The most misunderstood filler area
Under eye filler — technically called tear trough filler — is one of the most searched and most misapplied injectable treatments in aesthetic medicine. It has the highest potential reward (the tired, hollow look resolved instantly) and one of the highest rates of complications when performed incorrectly. The periorbital anatomy is among the most complex and vascular in the face, and the tissue is uniquely thin and unforgiving of error.
This guide covers what good tear trough treatment looks like, what causes the common problems, who is and is not a good candidate, and why the under-eye area has become one of the primary use cases for ultrasound-guided filler assessment at Plump Medical Spa in Newport Beach.
What tear trough filler actually treats
The tear trough is the groove running from the inner corner of the eye outward along the lower eyelid-cheek junction. As the face ages — and as volume is lost through weight loss, GLP-1 medications, or natural aging — this groove deepens, creating a shadow that makes patients look tired, hollow, or older than they feel.
Filler placed along the tear trough fills this groove, reducing the shadow and creating a smoother transition from the lower lid to the cheek. When done correctly, the result is one of the most striking transformations in aesthetic medicine — patients look rested, refreshed, and years younger without looking altered. When done incorrectly, it is also one of the most visible and stubborn complications to address.
Filler productLow-density HA only (Restylane, Belotero)
Amount used0.3–0.5ml per side (very small)
Placement depthDeep supraperiosteal — close to bone
Duration12–18 months
DowntimeBruising and swelling 5–10 days
Risk level vs other areasHigh — requires experienced physician
Cost at Plump$799 /syringe
Why this area goes wrong so often
The periorbital area is uniquely challenging for several reasons that most patients are not told before their appointment elsewhere.
01
Wrong product — Tyndall effect
Placing thick, high-viscosity HA filler in the shallow tissue beneath the thin lower eyelid skin produces the Tyndall effect — a bluish or grayish discoloration visible through the skin. The under-eye requires the softest, lowest-density HA fillers available. Using the wrong product is the most common cause of the blue-gray discoloration patients present with months or years after poorly performed tear trough treatment.
02
Too much product — pillow puffiness
The tear trough is a very small anatomical space. Most experienced physicians use 0.3–0.5ml per side — a fraction of a syringe. Providers who are accustomed to treating larger areas may place far too much, creating a puffy, overfilled appearance that is more visible than the original hollowing. Excess HA also attracts water, which worsens swelling, particularly in the morning after lying flat.
03
Wrong depth — superficial placement
Filler in the tear trough must be placed deep — at the supraperiosteal level, close to the orbital bone. Superficial placement in the subdermis distributes through the loose tissue planes of the lower eyelid, causing puffiness, migration into the eyelid itself, and visible lumping. Deep placement keeps the product where it belongs and produces a smoother surface result.
04
Not the right candidate
Under-eye hollowing has multiple causes — volume loss, fat pseudoherniation (eye bags), skin laxity, and pigmentation. Filler only addresses volume loss. Patients with prominent eye bags (fat bulging forward) are often made worse by filler, which adds volume behind the bulge rather than in the hollow below it. A proper clinical assessment distinguishes these before any product is placed.
05
Vascular occlusion
The periorbital area contains the angular artery and multiple vascular branches with direct communication to the ophthalmic artery. An accidental intravascular injection is a rare but serious complication — the angular artery supplies retinal circulation. This is one of the primary reasons ultrasound guidance — which allows visualization of vascular structures before injection — is particularly valuable in this area.
Why ultrasound guidance matters here more than anywhere
The under-eye is one of the areas where the Butterfly iQ3 ultrasound device used at Plump provides the greatest safety benefit. Real-time imaging allows Dr. Mortazavi to identify vascular structures before placing the needle, confirm the exact depth of product placement, and detect any existing filler accumulation before adding more. Patients who have had filler placed elsewhere and are concerned about the result can have their existing filler mapped before any decision is made about dissolving or adding.
Who is a good candidate
Volume-related hollowing — patients where the tear trough is deepened primarily by loss of fat volume in the midface and tear trough itself, with no significant eye bag (fat pseudoherniation). This is the primary indication.
Younger patients without significant skin laxity — tear trough filler works best when the skin overlying the treatment area is relatively smooth and elastic. Significant skin crepiness or laxity limits the result and may require different interventions.
Patients with dark circles caused by shadowing, not pigment — filler addresses the hollow that casts a shadow. It does not treat pigmentation-based dark circles. Patients should be assessed for which mechanism is causing their discoloration before proceeding.
Who should not get tear trough filler
Prominent eye bags (fat pseudoherniation) — placing filler behind a fat herniation adds volume in the wrong area and often makes bags appear more prominent. Surgical blepharoplasty or careful midcheek filler placement is the correct approach.
Significant skin laxity or crepiness — very thin, loose skin over the lower lid limits how much improvement filler can produce and may visibly show the product through the skin.
Patients with a history of swelling or edema around the eyes — those who regularly experience morning puffiness may experience amplified swelling after tear trough filler, as the HA attracts additional fluid.
If your existing tear trough filler looks puffy, bluish, or wrong — this is one of the most correctable filler complications. Ultrasound-guided dissolving at Plump can assess the exact location and amount of filler, then place hyaluronidase precisely into the deposit. Most Tyndall effect, puffiness, and migration cases resolve well with dissolving, followed by a fresh assessment of whether re-treatment is appropriate. Ultrasound mapping is $299, dissolving is $450.
Frequently asked questions
How long does tear trough filler last?
Tear trough filler typically lasts 12–18 months. The low muscle activity in this area contributes to relatively good filler longevity. Some patients find under-eye filler persists longer than in higher-movement areas. Ultrasound imaging can confirm how much product remains before any top-up appointment.
Why does my under eye filler look puffy or blue?
Puffiness is typically caused by too much product, too-superficial placement, or a product with too high a water-attracting capacity for this area. The bluish Tyndall effect is caused by filler placed too superficially in thin lower-lid skin — light scatters off the filler through the skin. Both are correctable with ultrasound-guided dissolving.
Can I dissolve bad tear trough filler at Plump?
Yes. Plump Medical Spa offers ultrasound-guided filler mapping ($299) and dissolving ($450) for under-eye filler placed at any practice. The Butterfly iQ3 device confirms filler location before enzyme is placed — this is especially important in this high-risk area where blind dissolving carries more uncertainty.
Is under eye filler right for eye bags?
No — eye bags caused by fat pseudoherniation (fat pushing forward through the orbital septum) are not improved by filler and may be worsened by it. Filler addresses volume-related hollowing, not herniated fat. A clinical assessment distinguishes between these causes before any treatment is recommended.
How much does under eye filler cost at Plump Medical Spa?
Under eye filler at Plump Medical Spa is $799 per syringe. Most patients use less than one full syringe across both eyes. Every treatment is performed personally by Dr. Mortazavi with low-density HA filler appropriate for this area. Cherry Financing and CareCredit accepted.