In short. Dark circles are four different problems that look alike in a mirror: pigment in the skin, vessels under thin skin, a hollow along the tear trough, and a forward fat pad. Two are a colour and two are a shadow, and the shadows are opposites, so a treatment that helps one can worsen another.
Key points
- Four mechanisms produce darkness under the eye: pigment, vessels, a hollow and a forward fat pad.
- Two are a colour and two are a shadow, and they need different treatments.
- Pigment reads brown in every light and travels with the skin when stretched.
- A hollow fills when the cheek is lifted; a bulge becomes more obvious.
- Adding support removes a hollow's shadow and increases the shadow of a bulge.
Four separate mechanisms produce darkness under the eye. The four are worth learning because they are treated in directions that have nothing in common: two are a colour and two are a shadow, and the two shadows are opposites of each other.
What are the four problems called dark circles?
All four sit in the same few square centimetres beneath the eye, and all four appear as darkness. They differ in the tissue responsible, in the observation that identifies each one, and in the direction treatment has to take.
| Kind | What is responsible | What identifies it | What it is not |
|---|---|---|---|
| Pigment in the skin | Melanin held within the skin itself | Brown in every light, and it travels with the skin when stretched | Not a shadow |
| Vessels showing through thin skin | The vessel bed beneath a surface too thin to hide it | Bluish or purplish cast, sometimes a fine network at the inner corner; worse when tired, unwell or cold | Not a deposit of colour |
| A hollow along the tear trough | Tissue that has fallen away, leaving a valley | Lifting the cheek gently fills it and takes the shadow with it | Not too much tissue |
| A forward fat pad | Fat standing proud of the skin below it | Looking up and lifting the cheek makes it more obvious | Not a hollow |
| Two or more at once | Different tissues in the same eye | Each kind identified by its own observation | Not a single problem with one treatment |
Pigment held in the skin
Melanin sits within the skin itself. It reads brown rather than blue or grey, it is the same in every light, and it runs in families. Stretching the skin under the eye carries it along, and the darkness does not move away. This is the kind that treatments aimed at pigment can reach.
Vessels showing through thin skin
The skin under the eye is the thinnest on the body. Where it thins further, the vessels beneath become visible and give a bluish or purplish cast, sometimes with a fine network at the inner corner. It is worse when a person is tired, unwell or cold. What is being seen is not a deposit of colour but the vessel bed beneath a surface too thin to hide it.
A hollow that catches shadow
Where the tissue along the tear trough has fallen away, the surface becomes a valley. Light from above does not reach into it, so the area reads as dark. Lifting the cheek gently fills it and takes the shadow with it, and that observation identifies it.
A bulge that throws its own shadow
Fat that has moved forward stands proud of the skin below it and casts a crescent of shadow on to that skin. Asking the patient to look up, and lifting the cheek, makes the bulge more obvious rather than less, which is how it is told apart from a hollow.
Why are the two shadows treated in opposite directions?
A hollow is too little tissue and a bulge is too much, and both produce darkness. Adding support to a hollow removes its shadow. Adding support beneath a bulge increases weight and shadow instead. Two appearances that look almost identical call for treatments that move in opposite directions.
Three mistakes follow from that:
- Filling a bulge mistaken for a hollow, which adds weight and makes the area darker.
- Removing fat from a face whose darkness came from a hollow, leaving a gaunt, shadowed eye.
- Buying a course of pigment treatment for a shadow that lies beneath the skin.
What do the four have in common?
Only the setting. They occupy the same few square centimetres, they are seen under the same overhead light, and they all appear as darkness. Beyond that they share nothing: a different tissue is responsible in each case, a different observation identifies it, and a different treatment addresses it.
Sources
- American Academy of Dermatology — dark circles under the eyes
- British Association of Dermatologists — periorbital hyperpigmentation patient information
- DermNet NZ — periorbital hyperpigmentation
Internal links
Frequently asked questions
Can more than one of the four be present at once?
Yes, and in older faces it is the rule rather than the exception. A face can have pigment in the skin, visible vessels beneath it, a hollow along the tear trough and a fat pad above it, all in the same eye. A plan addressing only one of them can therefore leave a patient genuinely treated and still unhappy with what they see.
Is a family tendency the same thing as pigment?
It usually is one form of it. Darkness that several members of a family share, that appeared early in life and that has been stable for years is most often pigment held in the skin. A family tendency does not protect against the other three, though: a hollow and a bulge can develop in the same face later and be mistaken for the pattern that was always there.
Why does my darkness look worse in some photographs than in others?
Because a camera records shadow more starkly than an eye does. A flash from directly in front removes shadow almost completely, while a light overhead deepens it. Two photographs taken on the same day can therefore look like two different faces, which is why a picture is a record of one moment in one light rather than evidence about a mechanism.
Risks & Limitations
- Filling a bulge mistaken for a hollow adds weight and shadow rather than removing them, and correcting that is harder than the original complaint.
- Agents and peels that act on pigment can irritate the skin, and pigment returns or deepens when sun protection is not kept up.
- Light treatment is given over a series of sessions, and the result is judged weeks later rather than immediately.
- No treatment removes the shadow cast by the bone rim around the eye, and the area continues to change for unrelated reasons.
When to Seek Care
- Darkness on one side only, or a change that has appeared over weeks rather than years.
- Bruising without an injury, a lump that can be felt, or swelling that does not settle.
- Eye pain, double vision, or any change in vision — seek urgent care.
- Darkness with fatigue, weight change or heavy periods, which needs a medical assessment.
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.