Under-eye filler swelling and puffiness: fluid, festoons or filler that stayed
Medically reviewed by Dr Sin Yong · Last reviewed · 7 min read
Published 9 October 2026 · Reviewed by Dr Sin Yong
Swelling in the first days after under-eye filler is expected. Puffiness that lasts for weeks, comes and goes with salt and sleep, or appears years later is different. It is usually one of three things: malar oedema, filler that has persisted and drawn in water, or a pre-existing bag that filler has made more visible.
Short answerPersistent puffiness after under-eye filler is commonly malar oedema, fluid trapped above the malar septum where drainage is poor, or retained hyaluronic acid filler that holds water. Larger volumes raise the risk. Retained HA can be dissolved with targeted hyaluronidase; fluid without filler is managed differently, which is why the two are told apart first.
Fluid in a poorly draining compartment of the upper cheek; worse in the morning
Retained filler
HA found on MRI years after injection; can draw in water
Risk factors
Higher volume; placement above the malar septum; existing festoons or bags
Swelling in one large series
10% of 1,452 tear trough treatments, median four weeks (Wilde 2023)
Correction
Dissolve filler if present; manage fluid; reassess
Why does the under-eye swell after filler?
The lower eyelid and upper cheek drain fluid poorly. Between the orbicularis retaining ligament and the zygomaticocutaneous ligament lies a compartment whose lymphatic drainage is limited, and hyaluronic acid placed into or above it can hold fluid there. Recent expert recommendations list high filler volume and placement superficial to the malar septum among the risk factors, and favour fillers with low water-binding capacity in this area (Baranska-Rybak, Dermatol Ther 2026). Malar oedema after filler has long been described as particularly significant and long-lasting (Funt, J Clin Aesthet Dermatol 2011).
In a series of 1,452 tear trough treatments, swelling occurred in 10% of eyes, lasting a median of four weeks, and larger volumes significantly increased the risk (Wilde, PRS Global Open 2023).
Filler above the malar septum can hold fluid in a compartment that drains poorly. Schematic, not to scale.
Puffiness years later: filler that stayed
Hyaluronic acid filler can last far longer than often expected. A review of 33 MRI studies found HA in the mid-face of every patient imaged, including 12 who had not been injected for more than five years (Master, PRS Global Open 2024). Periocular filler has been documented causing new swelling up to nine years after injection (Chang, Ophthalmic Plast Reconstr Surg 2017), and a late “pale puffy lower eyelid pillow” from retained filler is easily mistaken for festoons (Lederhandler, J Drugs Dermatol 2021). Top-ups placed on filler that has not gone are a common route to this.
Puffiness that is worse in the morning or after salty food points towards fluid; a soft, constant fullness towards filler.
How fluid is told apart from filler
Dr Sin Yong takes the history first: when the filler was placed, how much, and whether there were top-ups. Fluid tends to vary through the day and with salt, sleep and alcohol; filler tends to be constant and to have an edge on gentle palpation. He looks at the eyes at rest and in a full smile, then uses ultrasound to see whether gel is present, how deep it is and whether it sits above the malar septum. A true fat bag behind the septum is a different problem altogether, and filler is not its answer.
Fluid, retained filler and a true fat bag are three different problems with three different answers.
What is done
Where retained hyaluronic acid is contributing, it can be dissolved selectively with hyaluronidase, after a test dose, treating to effect and reassessing once swelling has settled, as published guidance recommends (King 2018; Murray 2021). Where swelling is fluid without significant filler, time, and addressing the triggers, are often part of the plan. Where the skin itself is lax after the swelling has gone, skin tightening is considered separately. Filler is not added to a puffy area to disguise it.
Urgent: swelling that is hot, red and painful, or any vision change or eye pain after filler, needs immediate medical review.
Frequently Asked Questions
Expected swelling and bruising usually settle within about two weeks. In one large series, swelling that was recorded lasted a median of four weeks. Puffiness that persists beyond that, or appears later, should be assessed.
Fluid collecting in a poorly draining compartment of the upper cheek and lower eyelid. Filler placed above the malar septum and larger volumes increase the risk. It is often worse in the morning.
Yes. MRI studies have found hyaluronic acid filler in the mid-face more than five years after injection, and periocular filler has been reported causing swelling up to nine years later.
When retained hyaluronic acid is part of the cause, dissolving it selectively with hyaluronidase can help. When the swelling is fluid without filler, or a true fat bag, dissolving alone is not the answer.
References
Baranska-Rybak W, Lajo-Plaza JV, Walker L, Alizadeh N. Malar oedema after hyaluronic acid dermal fillers: expert recommendations on aetiology, prevention and management. Dermatol Ther (Heidelb). 2026. doi:10.1007/s13555-026-01920-w. source
Funt DK. Avoiding malar edema during midface/cheek augmentation with dermal fillers. J Clin Aesthet Dermatol. 2011;4(12):32-36. PMID 22191006. source
Wilde CL, Gupta A, Lee S, Ezra DG. Tear trough filler using the three-point tangent technique: lessons from 1452 tear trough applications. Plast Reconstr Surg Glob Open. 2023;11:e5060. doi:10.1097/GOX.0000000000005060. source
Master M, Azizeddin A, Master V. Hyaluronic acid filler longevity in the mid-face: a review of 33 magnetic resonance imaging studies. Plast Reconstr Surg Glob Open. 2024;12(7):e5934. doi:10.1097/GOX.0000000000005934. source
Chang JR, Baharestani S, Salek SS, et al. Delayed superficial migration of retained hyaluronic acid years following periocular injection. Ophthalmic Plast Reconstr Surg. 2017;33(3S):S116-S118. doi:10.1097/IOP.0000000000000434. source
Lederhandler M, Belkin D, Anolik R, Geronemus RG. The rise and fall of the pale puffy lower eyelid pillow. J Drugs Dermatol. 2021;20(4):475-476. doi:10.36849/JDD.2021.5509. source
King M, Convery C, Davies E. The use of hyaluronidase in aesthetic practice (v2.4). J Clin Aesthet Dermatol. 2018;11(6):E61-E68. PMID 29942426. source
Murray G, Convery C, Walker L, Davies E. Guideline for the safe use of hyaluronidase in aesthetic medicine, including modified high-dose protocol. J Clin Aesthet Dermatol. 2021;14(8):E69-E75. PMID 34840662. source
