Why won't anything fix my dark circles?
Usually because the product is aimed at the wrong one of three different things. Dark under-eyes are caused by blood vessels showing through thin skin, by actual pigment in the skin, or by a shadow cast by the shape of the eye socket. All three look similar in a mirror. Almost nothing helps all three.
The reason the internet is useless on this
Search this question and you get one answer: a cream, a concealer trick, and a suggestion about sleep.
That is not wrong so much as it is answering a question nobody asked. "Dark circles" is a description of an appearance, not a cause — like "a rash" or "a limp". It tells you what someone sees. It tells you nothing about why.
Three quite different things produce almost exactly the same look, and the reason most people have tried four products without success is that they have been treating whichever one the product happened to be for.
One: blood vessels showing through
The skin under the eye is the thinnest on the body — often under half a millimetre. Directly beneath it sits a dense network of small blood vessels.
When the skin is thin enough, or the vessels are full enough, you see them. Not as vessels — as a diffuse blue, purple or grey wash. It is the same reason the inside of your wrist looks blue.
It gets worse with anything that makes vessels fuller or skin thinner: poor sleep, crying, a cold, allergies, salt, alcohol, and simply getting older, because the skin thins with age.
What it looks like
Blue-ish, purple-ish or grey rather than brown. Often worse in the morning and better by afternoon, or noticeably worse on a bad night. Sometimes visibly better when you lie down, then worse again when you stand.
Why creams mostly do not touch it
The colour is not in the skin. It is showing through it. A pigment-fading product has nothing to fade.
Things that thicken the skin over time can genuinely reduce it, which is slow and partial rather than dramatic. Things that reduce fluid help temporarily. Caffeine in eye products works a little, briefly, by constricting vessels — which is why the effect wears off by lunchtime.
Two: actual pigment in the skin
This one is real melanin, sitting in the skin the way a freckle does.
It is strongly associated with genetics and skin tone — it is considerably more common in people with deeper skin tones, and it frequently runs in families in a way the other two do not. It can also be caused or worsened by inflammation: eczema around the eye, chronic rubbing from hayfever, or an irritating product used near the lash line.
It can also be caused by treating it. Skin around the eye is easily inflamed, and inflammation in skin that pigments readily produces more pigment. This is the one type where the wrong approach reliably makes things worse, which is why it is worth identifying before anyone starts.
What it looks like
Brown or tan rather than blue or grey. Fairly constant — it does not swing with sleep or time of day. Often extends beyond the hollow itself, sometimes onto the eyelid or out towards the temple.
The rubbing point
If you have hayfever and rub your eyes, that is not a minor detail. Repeated friction is a known cause of pigmentation in that skin, and it is one of the few things on this page that is entirely within your control and completely free to change.
Three: a shadow, not a colour at all
This is the one almost nobody mentions, and for a lot of people it is the main thing.
The eye sits in a socket. Below the eye is a small ridge of bone. Between them the tissue is thin, and there is a natural groove where the lower eyelid meets the cheek.
As the socket widens and the fat pads of the cheek lose volume and slide downward, that groove deepens. A deeper groove catches less light. What you see is a dark curve under the eye — and there is no colour there at all. There is a hollow.
You can prove this to yourself in about four seconds: stand in front of a mirror under a downward light and look at the circles, then tilt your face up towards the light. If they substantially disappear, you are looking at a shadow. Nothing in a jar changes the shape of a hollow.
This is the under-eye version of what happens across the whole face — see your face is changing shape, not just texture, which is the longer explanation.
Why this one is so often mistaken for tiredness
Because a hollow under the eye is what tiredness looks like. That is the association everyone has, so a structural change gets read as a lifestyle failure — and people spend years trying to sleep their way out of an anatomical shape.
Working out which one you have
None of this is a diagnosis and a clinician should confirm it, but three observations get most people a long way:
| Test | What it suggests |
|---|---|
| Stretch the skin gently sideways. If the colour stays, it is more likely pigment. If it fades, more likely vascular | Pigment vs vascular |
| Tilt your face up towards a light. If it largely disappears, it is shadow | Structural |
| Compare morning and evening, and a good night against a bad one. Big swings point vascular; no change points pigment or structure | Vascular vs the other two |
Most people have more than one. That is the usual finding, not the exception — commonly a shadow with a vascular component, or pigment sitting on top of a hollow. Which is precisely why single-cause products disappoint: they address a third of the problem and get judged on all of it.
Three things that are not on this list, and belong with your GP
Under-eye darkness is occasionally a sign of something systemic rather than local. A skin clinic is not the place for any of these:
- Iron deficiency and anaemia can cause it, and is common enough in menstruating women to be worth ruling out
- Thyroid conditions can change the skin and the tissue around the eye
- Allergy — persistent, both-sided, with itching or a blocked nose, is often described as "allergic shiners"
If it appeared suddenly, is on one side only, comes with swelling or pain, or is changing quickly — see a doctor, not a clinic. That is not a disclaimer for the sake of it. All three of the causes above develop slowly; anything that arrived fast is a different question.
The honest summary
Vascular responds partially and slowly to things that thicken skin, and temporarily to things that reduce fluid. It is rarely eliminated.
Pigment responds to appropriate pigment management and to removing whatever is inflaming it, which is often the rubbing. It is slow, it needs sun protection to hold, and it is easily made worse.
Structural does not respond to anything applied to the surface, because there is nothing on the surface to respond. What it does respond to is a separate conversation — and one we are not permitted to have on a public page, which is a regulation rather than a coyness.
And the fourth honest answer: sometimes the right thing is nothing. Under-eye shadow is close to universal past a certain age. Some people, once they know it is a hollow rather than a stain, stop minding. That is a real outcome and we do not treat it as a failed consultation.
Working out which of the three you have — and whether it is worth doing anything about — is what a consultation is for. It is $150, it takes an hour, and it is not unusual for the answer to be that your dark circles are a shape and there is nothing wrong with you.