WHAT TO KNOW
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Sometimes you notice the change most in photographs. The area beneath the eyes looks deeper in overhead light, or a shadow appears that is much less obvious from another angle.
That does not automatically mean the skin itself is darker. A hollow can change how light falls between the lower eyelid and cheek, creating a darker-looking groove even when pigment is not the main issue.
This difference matters because under-eye hollows, puffiness and pigmentation can sit close together, but they are not interchangeable concerns.
What Under-Eye Hollows Are
An under-eye hollow is a groove or depression where the lower eyelid meets the upper cheek. The term ‘under-eye hollows’ usually refers to this contour change. The tear trough is the best-known part of the area.
What you see at the surface depends on several structures underneath. Skin and fat can affect the contour. Muscle, retaining ligaments and bone may matter too. That is why two people with a similar-looking groove may not have exactly the same anatomy.
A visible tear trough is also a normal facial feature for many people. It does not need treatment simply because it is present.
| What you notice | Likely feature | How it behaves |
| A groove or dip | Structural hollowing | Often changes with lighting |
| Darker-looking skin | Pigment or visible underlying colour | Can remain visible across angles |
| Fullness or a bulge | Puffiness or an under-eye bag | Creates volume rather than a depression |
Why Hollow Eyes Become More Noticeable
Once you know the darkness is partly coming from the contour, the next question is why that groove is visible. It may be part of your natural facial structure. It can also become more noticeable with age or after changes in facial volume. More than one factor can be involved.
Natural Facial Structure
Some people have had a visible tear trough from a young age. The shape of the lower eyelid, cheek and underlying bone varies naturally from face to face.
This is one reason a hollow can run in families without representing a medical problem.
Age-Related Changes
The under-eye and mid-cheek area change gradually over time. Skin can become thinner, support tissues can become more lax, and fat may change in volume or position.
The bony support of the midface also changes with age. Together, these normal changes can make an existing groove look deeper or more defined.
Changes in Facial Volume
Substantial weight loss can change facial volume, particularly through the mid-cheek. In some people, that can make an existing under-eye hollow look more noticeable.
The effect varies considerably, and evidence specific to the tear trough is more limited than evidence for broader midface volume change (Jafar et al., 2024).
How Hollows Create Shadow
The same groove can also change how the under-eye reads in different light. A hollow can create a shadow without adding pigment to the skin.
That is why under-eye darkness that changes with lighting or angle may have a structural component. Pigmentation, visible underlying vessels, and puffiness can all be present at the same time.
If colour remains equally visible in different lighting, pigment or underlying vascular colour may also be contributing. If fullness sits above the groove, an under-eye bag may also be part of the picture.
| Dermatologist’s Perspective: More Volume Is Not Always Better Dr Sukhsagar Ratol, MBBS, MD • Founder & Director, Ageology Skin Clinic A shallow tear trough can sit beside a small bag and make the area look darker. In that situation, filling every dip is not the answer. Too much volume can make the lower eyelid look heavier, especially when the skin is thin or puffiness is already present. The aim is to soften a genuine hollow, not chase every shadow with filler. |
Treatment Options for Under-Eye Hollows
There is no single hollow-eye treatment that suits everyone. Sunken eyes treatment also depends on the anatomy involved. If you are wondering how to treat hollow eyes, start with the anatomy rather than the procedure.
A treatment for volume loss will not fix pigment or puffiness. It will not change visible vascular colour either. The plan should depend on whether the main issue is volume, skin quality, a nearby bag or a mix.
Skincare and Surface Skin Quality
Eye creams and moisturisers can help with hydration and surface comfort. Other topical products may help when pigmentation or skin quality is part of the concern. They cannot fill a pronounced structural groove or replace deeper volume.
Tear-Trough Filler
Hyaluronic acid filler may soften a selected tear-trough hollow when the anatomy is suitable. Its job is to reduce the depth of the groove and the shadow created by it, not to treat every form of under-eye darkness.
Swelling, bruising and contour irregularity are recognised risks, which is why the amount used and the surrounding lower-eyelid anatomy matter as much as the presence of a hollow itself.
Skin-Quality Treatments
If texture or pigmentation is contributing, a skin-focused treatment may be discussed. The same applies when visible underlying colour or laxity is part of the picture. These treatments can improve the skin around a hollow. They do not replace structural volume.
Not sure whether you are seeing a hollow, shadow or puffiness?
| WHEN FILLER IS NOT THE FIRST ANSWER Filler is less likely to be the right starting point when a prominent bag or persistent puffiness sits above the hollow, when lower-eyelid support is limited, or when the darkness is mainly pigment or visible underlying colour rather than shadow. Previous filler can change the picture too. Residual product, swelling or contour irregularity may need to be understood before anything more is added. In these situations, the better next step may be a different skin treatment or no treatment at all. More complex lower-eyelid anatomy may need specialist assessment. That does not mean surgery is automatically needed. It means the anatomy should be understood before more volume is added. There is one separate situation that should not be treated as a routine cosmetic hollow: a sudden or progressive change in the position of the eye itself. |
| MEDICAL EYE ASSESSMENT MATTERS A routine tear trough is a contour of the lower eyelid and cheek. A change in the position of the eye itself is different and should not be treated as a cosmetic hollow. Seek medical or eye assessment if: The eye appears to sit further back suddenly or progressively. The change is mainly on one side. It follows an injury or trauma. There is double vision, pain or restricted eye movement. These features need an eye assessment before any cosmetic treatment is considered. |
Under-Eye Assessment
You do not need an assessment simply because you have a visible tear trough.
It can be useful if:
- The hollow has become more noticeable and bothers you.
- You are unsure whether the darkness is shadow, pigment or both.
- Puffiness or bags are also present.
- You have had previous under-eye filler.
- You are considering treatment and want to understand what is realistically being targeted.
Assessment should come before treatment choice. The plan should be based on the anatomy involved, not on appearance alone.
Under-eye hollowing can look very different from one face to another.
Frequently Asked Questions
What are under-eye hollows?
Under-eye hollows are grooves or depressions where the lower eyelid meets the upper cheek. A visible tear trough is one common form, and it can create shadow without the skin itself being darker.
Can hollow eyes be reversed?
That depends on what is creating the hollow. A naturally visible tear trough is part of facial anatomy and does not need to be “reversed”. Selected treatments may soften a structural hollow, but no single option is suitable for everyone.
Are sunken eyes genetic?
They can be influenced by inherited facial anatomy. Some people naturally have a more defined eyelid-cheek groove from a younger age, while age-related changes can make the same contour more visible later.
Can weight loss cause under-eye hollows?
Substantial weight loss can change facial volume and may make an existing under-eye hollow more noticeable in some people. The strongest evidence relates to midface and cheek changes rather than proving that weight loss always creates a tear trough (Jafar et al., 2024).
Can eye cream fix hollow eyes?
No cream can fill a structural hollow. Skincare can support hydration and surface skin quality, but it cannot replace deeper volume or remove a pronounced anatomical groove.
What is the difference between hollow eyes and under-eye bags?
A hollow is a groove or depression, while an under-eye bag creates fullness. They can appear beside each other, which can make both the shadow and the fullness look more noticeable.
References
Beer, J., Boghosian, T., Sherif, R., Montes, J., Tosti, A., Rohrich, R. and Beer, K. (2026) ‘What’s New With Under Eye Treatment: A Multispecialty Systematic Review of Recent Under Eye Treatments’, Dermatologic Surgery, 52(2), pp. 155–163.
Jafar, A.B., Jacob, J., Kao, W.K. and Ho, T. (2024) ‘Soft Tissue Facial Changes Following Massive Weight Loss Secondary to Medical and Surgical Bariatric Interventions: A Systematic Review’, Aesthetic Surgery Journal Open Forum, 6, ojae069.
Jiang, J., Wang, X., Chen, R., Xia, X., Sun, S. and Hu, K. (2016) ‘Tear trough deformity: different types of anatomy and treatment options’, Postępy Dermatologii i Alergologii, 33(4), pp. 303–308.
Liu, X., Gao, Y., Ma, J. and Li, J. (2024) ‘The Efficacy and Safety of Hyaluronic Acid Injection in Tear Trough Deformity: A Systematic Review and Meta-analysis’, Aesthetic Plastic Surgery, 48(3), pp. 478–490.
Shah, S.S. and Patel, B.C. (2025) ‘Enophthalmos’, in StatPearls [Internet]. Treasure Island, FL: StatPearls Publishing. Updated 13 December 2025.
