In short. Three contributors produce the trough, and genetics and age shift the balance between them. Which one dominates in your face changes what treatment can reach.
Key points
- A face with a strongly shaped rim shows a visible trough in the twenties that changes little for years.
- A face with a smooth rim may show almost nothing until volume begins to go, and then the change is progressive rather than fixed.
- The same volume loss reads very differently on the two.
Three things produce a hollow under the eye, and they are not variations on one process. They combine in different proportions in different faces. Which of them is doing most of the work decides what treatment can reach.
Volume that has gone
The deep fat that cushions the lid against the bone thins with time, and the bone beneath the midface loses projection as well. The lid and the cheek, which once met in a smooth transition, are left with a step between them. This is the contributor that responds to added volume, and it is what most people mean when they say the area has become hollow with age.
Bone that was always shaped that way
The orbit is not the same in every face. A rim that projects further forward, or a cheekbone that projects less, sets a trough from childhood and keeps it there. This is inherited, it is symmetrical, and it does not change with time the way volume loss does. The honest answer for many people in this group is that nothing needs doing.
A ligament that holds the skin down
A band runs from the bone of the rim to the skin of the lid and holds the two together. Where it is tight it produces a fixed groove rather than a soft hollow, and that groove does not move when the cheek is lifted. This is the contributor that most often changes a plan: volume placed under a band that is still attached can be divided by it and appear as two ridges.
Genetics sets the frame; age decides what is added to it
A face with a strongly shaped rim shows a visible trough in the twenties that changes little for years. A face with a smooth rim may show almost nothing until volume begins to go, and then the change is progressive rather than fixed. The same volume loss reads very differently on the two.
What is not on the list
Fluid is not a cause of a hollow, but it is a common reason one looks worse on a given morning: it changes through the day and it is not answered with volume. Fat that has pushed forward is the opposite problem, though the two often appear in the same face, because fat that has moved away leaves a hollow where it used to sit. Medical causes are a separate matter again: thyroid, kidney, allergic and sinus disease change this area, and they are established before anything cosmetic is planned.
When the cause needs a doctor rather than a plan
- A hollow that appeared in one eye only, or over weeks rather than years
- Swelling that is new, painful or one-sided, or an eye that bulges forward
- Any change in vision, or double vision, however brief
How the three contributors are told apart in the room is described in the guide to lid support, and what happens when the wrong one is treated is set out in the warning about filling a bulge.
Frequently asked questions
If my mother has hollows under her eyes, will I get them too?
You are more likely to, because the shape of the orbital rim and the thickness of the lid skin are inherited. What is inherited is the framework rather than the timing: a trough set by bone is there early and stays stable, while one produced by volume loss appears later and deepens gradually. Knowing which runs in your family is a useful clue.
Does losing weight cause hollows under the eyes?
It can make an existing one more obvious, because the fat that cushions the lid is part of the same tissue that changes elsewhere. A hollow that appeared alongside significant weight loss is worth mentioning when you are assessed, and weight that has changed recently makes this a less stable picture to treat than one that has been steady.
Can hollows be prevented?
The bone and the ligament are not something a routine can change, and no cream or supplement has been shown to restore the fat that cushions this area. What can be modified is the part that comes from fluid, sun exposure and sleep, and controlling those changes how the area looks on a given morning rather than whether a trough forms over the years.
Risks & Limitations
- Adding volume beneath a bulge makes the lid read heavier, and correcting that is slower than the original problem.
- Material placed in this area can enter a vessel that connects with the circulation of the eye; skin changes and, rarely, effects on vision are the reason quantities here are small.
- Bruising is common and usually settles within one to two weeks; fluid, firmness and a bluish tone under thin skin may take longer.
- Under-filling is easier to correct than over-filling, which may have to be waited out.
- Final results after surgery are judged at months, not weeks, and further treatment may be needed.
When to Seek Care
- Any change in vision, or double vision, at any point after an injection — seek emergency care immediately and say what was injected.
- Severe pain that does not settle, or skin turning pale, mottled, dusky or blistered.
- A change under one eye only, a change that appeared over weeks, a growing lump, or an eye that bulges forward.
- After surgery: spreading redness or fever, bleeding that will not stop, a wound that opens, or pain that worsens rather than settles.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — procedure and safety guidance
- National Institute for Health and Care Excellence (NICE, UK) — relevant guidance
- Cochrane Library — systematic reviews
- Chinese Medical Association Plastic Surgery Branch — clinical guidance
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.