Sunken under-eyes happen when the area beneath your lower eyelids loses volume, creating a hollow or shadowed appearance. The fix depends on how deep the hollowing is and what’s causing it. Options range from simple hydration and skincare changes to dermal fillers and surgery, each suited to a different level of severity.
What Causes the Hollowing
The sunken look comes from a combination of fat loss, bone changes, and weakening connective tissue around the eye socket. As you age, the fat pads that sit just above the cheekbone shrink and slide downward. At the same time, the small ligaments anchoring skin to the bone beneath your eye stretch out, letting everything sag and creating a visible groove called the tear trough.
Bone plays a role too. The upper jaw bone gradually loses density over time, which widens the gap between skin and bone in that under-eye area. If you naturally have a more prominent cheekbone structure, the ligament spanning from your inner eye corner to the jaw can get pulled tighter across the bone, making the depression look even deeper. Genetics, in other words, set the stage long before aging accelerates things.
Some people also develop puffiness or small fat bulges just above the hollow, which creates a shadow that makes the sunken area look worse than it is. This happens when the thin membrane holding orbital fat in place weakens and allows fat to push forward.
Rule Out a Medical Cause First
Not all under-eye hollowing is cosmetic. Iron deficiency can cause dark circles and a sunken appearance by reducing oxygen delivery to the thin skin beneath your eyes. If the hollowing appeared relatively quickly or came with fatigue, pale skin inside your lower eyelids, or shortness of breath, a simple blood panel checking hemoglobin, ferritin, and iron levels can confirm or rule out anemia. Dehydration and significant weight loss are two other common, reversible triggers.
What Sleep and Hydration Actually Do
Sleep deprivation makes under-eye hollowing visibly worse. In a study from the American Academy of Sleep Medicine, observers rated sleep-deprived faces as having darker under-eye circles, more swollen eyes, and droopier eyelids compared to the same people after a full eight hours. The effect was consistent enough that untrained strangers could spot it in photographs.
Chronic dehydration thins the skin and reduces its plumpness, which makes the natural contour of the eye socket more visible. Drinking adequate water won’t fill in a deep tear trough, but it can soften the appearance of mild hollowing and reduce the dark discoloration that accompanies it. Think of hydration and sleep as the baseline: they won’t solve structural volume loss, but skipping them makes every other intervention less effective.
Topical Products That Help (and Their Limits)
Eye creams can improve skin quality in the under-eye area, but they cannot restore lost fat or bone volume. The most useful ingredients work by thickening the skin slightly, reducing pigmentation, or temporarily tightening the surface.
- Retinoids and peptides stimulate collagen production over weeks to months, gradually making the skin under your eyes a bit thicker and firmer. Thicker skin is less translucent, which reduces the shadowy, hollow look.
- Caffeine constricts blood vessels temporarily, reducing puffiness and dark discoloration. It won’t change the depth of a hollow, but it can make the contrast less noticeable.
- Hyaluronic acid and plumping agents draw moisture into the skin’s surface layers. Plant-derived volumizing ingredients (like volufiline) are marketed to improve the look of under-eye hollowness by supporting fuller-looking skin, though the effect is subtle compared to injectable treatments.
- Vitamin C and niacinamide brighten pigmentation and support collagen, which helps with the dark circles that often accompany sunken eyes.
If your hollowing is mild, a good retinoid eye cream used consistently for three to six months can make a meaningful visual difference. For moderate to deep hollows, topicals are a complement to other treatments, not a replacement.
Dermal Fillers for Under-Eye Hollows
Hyaluronic acid fillers are the most common nonsurgical treatment for sunken under-eyes. A provider injects a small amount of gel into the tear trough to restore the volume that fat and bone no longer provide. The procedure takes about 15 to 30 minutes, and results are visible immediately.
Several hyaluronic acid fillers are used for this area, including Restylane, Belotero Balance, Juvederm Volbella, and Juvederm Vollure. The choice depends on how deep the hollow is and how thin your skin is. Thinner, softer fillers work best for the delicate under-eye area because thicker products can create visible lumps or a bluish tint called the Tyndall effect.
The published duration of effect ranges from 8 to 12 months on average, but a retrospective study in the Journal of Clinical and Aesthetic Dermatology found significant results lasting up to 18 months. Cost runs between $684 and $1,500 per treatment session, based on figures from the American Society of Plastic Surgeons. Most people need one syringe, sometimes two.
The main risks include bruising, swelling, and asymmetry. Rare but serious complications like vascular occlusion (where filler blocks a blood vessel) make it important to choose a provider experienced specifically with tear trough injections. One advantage of hyaluronic acid: it can be dissolved with an enzyme injection if the result isn’t right.
Laser and Skin-Tightening Treatments
Lasers don’t fill in volume, but they can reduce the appearance of hollowing by improving the skin itself. Ablative lasers remove microscopic columns of damaged skin, triggering a strong healing response that produces new collagen. Non-ablative lasers work beneath the surface without removing skin, creating controlled heat that stimulates collagen and elastin over time.
The practical result is thicker, less transparent under-eye skin. When the skin beneath your eyes is denser, blood vessels underneath are less visible, and the shadow effect from hollowing becomes less pronounced. Radiofrequency microneedling works through a similar collagen-stimulating mechanism and is sometimes preferred for patients who want minimal downtime.
These treatments work best for mild hollowing where dark circles and skin thinness are the primary concern rather than deep structural volume loss. Most people need a series of sessions spaced four to six weeks apart.
Surgery for Deep Hollowing
Lower blepharoplasty with fat repositioning is the most definitive treatment for significant under-eye hollowing. Instead of removing the fat that may be bulging above the hollow (which can make things look even more sunken over time), surgeons reposition that fat into the tear trough to fill in the depression. This addresses both the puffiness above and the hollow below in a single procedure.
Recovery takes one to two weeks off work. Most bruising and swelling resolve within the first two weeks, and sutures come out between days four and seven. You’ll see improvement early, but the final results settle in around the six-month mark as residual swelling fully resolves and repositioned tissue integrates into its new position.
Surgery makes the most sense when hollowing is deep, when fillers would require frequent maintenance, or when excess skin and fat bulging are part of the picture. The results are long-lasting, though aging continues and some patients choose minor touch-ups years later.
Matching Treatment to Severity
For mild hollowing with some dark circles, start with consistent sleep, hydration, and a retinoid or peptide eye cream. Give it three to six months. If shadows persist, a laser or RF microneedling series can thicken the skin and reduce discoloration.
For moderate hollowing where the groove is clearly visible in normal lighting, hyaluronic acid filler gives the most immediate and noticeable improvement without surgery. Plan on maintenance every 12 to 18 months.
For deep hollowing, especially with fat bulging above the tear trough, lower blepharoplasty with fat repositioning offers the most comprehensive and lasting correction. Many patients combine surgery with skin resurfacing treatments afterward for optimal results.