Dark Circles Under Eyes: The Four Causes and What Helps Each One

Why do I have dark circles under my eyes?

Because at least one of four things is happening in a patch of skin that is thinner than almost anywhere else on your body. The under-eye skin is roughly a third the thickness of cheek skin, has very little fat under it and sits over a dense web of blood vessels. Anything going on beneath it shows. The four usual culprits:

• Pigment. Extra melanin in the under-eye skin, often brownish, often with a family history, and more common in deeper Fitzpatrick phototypes. Sun exposure, rubbing and eczema all encourage it. Dermatologists call this periorbital hyperpigmentation.
• Vascular show-through. Thin, pale or fair skin lets the blue-purple of the blood vessels beneath show. This type looks worse when you are tired, congested or dehydrated, because the vessels dilate and the skin flattens over them.
• Structural shadow. A hollow between the lower lid and the cheek, the tear trough, catches overhead light and casts a shadow. It is anatomy, it tends to deepen with age as the fat pads shift, and no cream can fill it.
• Lifestyle. Short sleep, hay fever and other allergies, long screen sessions and not drinking enough water all make the first three worse. They rarely create circles alone, but they are the lever you can pull today.

Most people have a mix, usually one main driver plus a lifestyle multiplier. That matters because the fixes do not overlap much. Vitamin C does nothing for a hollow; a cold compress does nothing for melanin.

How do I tell which type of dark circles I have?

Stand near a window in daylight, no make-up, and run three quick checks.

1. The stretch test. Gently pull the under-eye skin outwards towards your temple. If the dark colour stays the same, it is pigment in the skin. If it gets lighter, blood vessels were showing through and stretching made them less visible. If the darkness disappears almost entirely, you were looking at shadow, and stretching removed the hollow.
2. The pinch test. Lightly pinch the skin and look at the colour of the fold. Brown or grey means melanin. Blue, purple or reddish means vessels.
3. Morning versus evening. Take a photo on waking and another at the end of the day in the same light. Vascular and lifestyle circles swing noticeably between the two; pigment and structural ones barely move. If your circles vanish after a good weekend, they were never pigment.

Write the answer down. It decides everything that follows, and it is worth re-testing once a year, because the dominant driver shifts with age.

Under-eye bags vs dark circles: what is the difference?

They are often lumped together, but they are different problems that happen to share an address. Dark circles are a colour or shadow issue: the skin looks darker than the surrounding cheek. Under-eye bags are a volume issue: the lower lid is puffy or swollen, either from fluid pooling overnight, from allergies and salt, or from the fat pad beneath the eye pushing forward with age.

The distinction matters because puffiness often creates a dark circle. A swollen lower lid casts a shadow onto the skin beneath it, so you see a structural circle that was not there yesterday. Morning puffiness that settles by lunchtime is fluid; treat it with sleep, a slightly raised pillow, less salt late at night and a cool compress. A bag that is the same shape at 8am and 8pm is anatomical fat, and only a clinic can change that.

If you have both, treat the swelling first. Reducing the puff removes the shadow it casts, and whatever discolouration is left is the real circle you need to work on.

What actually helps dark circles?

Match the fix to the type. Expect weeks for lifestyle changes and months for pigment.

If it is pigment:

• A vitamin C serum each morning, a pea-sized amount for both eyes, patted rather than rubbed. It slows new melanin production and brightens gradually over two to three months.
• Sunscreen every day, including the under-eye, which most people skip. UV drives melanin, so SPF is the one step that prevents the problem rather than chasing it. Sunglasses count too.
• A retinoid, but with real caution. Retinoids speed cell turnover and can soften pigment, but the under-eye is the easiest place on the face to over-treat. Start with a low-strength, eye-specific formula, two nights a week, kept on the orbital bone rather than the lash line. Our retinol beginner's guide covers how to build up without peeling.
• Stop rubbing. Friction from allergies, contact lenses and removing eye make-up is a quiet driver of pigment. Use an oil or balm cleanser that dissolves mascara without scrubbing.

If it is vascular:

• Sleep is not a cliché here. Seven to nine hours lets the vessels constrict and the tissue drain. The difference is visible by the second or third good night.
• Caffeine eye products constrict blood vessels for a few hours. The effect is real but temporary, which makes caffeine a morning tool, not a cure.
• Allergy control. Hay fever and dust-mite allergy cause nasal congestion that backs blood up in the veins beneath the eyes, the so-called allergic shiner. An antihistamine or nasal spray in season often does more than any eye cream.
• Drink water across the day. Dehydrated skin flattens and goes slightly translucent, which makes the vessels more obvious. A hydration check is a reasonable place to start if you suspect this.
• Screen breaks. Long screen sessions strain the eye muscles and dilate vessels around them. Twenty seconds looking at something distant every twenty minutes is cheap.

If it is structural: be honest with yourself about what a product can do. Nothing you apply fills a hollow. A peach or orange-toned colour corrector under a thin concealer neutralises the shadow for the day, and a light-reflecting formula helps more than a heavy one. For a lasting change, hyaluronic acid filler in the tear trough is a dermatologist or plastic-surgeon conversation, with its own risks and costs.

What does not work, and what makes dark circles worse?

The under-eye is a popular place to waste money. Things that generally do not deliver:

• Expensive eye creams for a structural circle. If the stretch test made your circle disappear, no texture or price point will.
• Hydroquinone or strong acids near the eye without supervision. They can lighten pigment, but the thin skin reacts unpredictably, and irritation itself causes pigment, so you can end up darker.
• Heavy occlusive night creams if you wake up puffy. They trap fluid and make morning bags worse, which then cast more shadow.
• Hemorrhoid creams and other internet hacks. Vasoconstrictors do shrink vessels briefly, but these products are not formulated for the eye area and the rebound is not worth it.
• Harsh make-up removal. Scrubbing off waterproof mascara every night is one of the most common and least suspected causes of pigment circles.

When should I see a dermatologist about dark circles?

Most dark circles are cosmetic, but a few patterns deserve a professional look. Book an appointment if the darkness appeared quickly over weeks rather than years, if it is only under one eye, if the skin is itchy, scaly or thickened (which points to eczema or contact allergy rather than ordinary pigment), or if circles arrived alongside unexplained tiredness, which can occasionally reflect anaemia, thyroid issues or another medical cause. A dermatologist can also confirm your type with a dermatoscope, prescribe pigment treatments that are safe near the eye, and discuss laser or filler if you want more than a topical routine can give. Our guide on app versus dermatologist explains where the line sits.

How Beeuty reads the eye area from a selfie

Beeuty's face map includes an around-the-eyes zone. When you scan, the app looks at tone evenness in that zone compared with the rest of your face, and at shadow cues that make the under-eye read darker than the cheek beside it. Those observations feed your overall skin score and your scan history, so you can see whether the area is trending lighter or darker across weeks, which is hard to judge honestly in a mirror.

The limits are important. A photo shows the result, not the cause. Beeuty cannot tell pigment from vascular from structural circles, because a camera sees darkness, not melanin or blood vessels or depth. The stretch and pinch tests above do that job better than any image analysis. Lighting also matters more here than anywhere else on the face: overhead light will exaggerate a tear-trough shadow in a scan, so use the app's guided camera in soft, even light.

Where the app adds something genuinely useful is the lifestyle link. The Beauty Sleep Score connects your reported sleep with how your skin, including the eye area, looks in each scan. If your circles track your short nights, that is the vascular or lifestyle type showing itself, and the fix is in your calendar, not your bathroom cabinet. Beeuty estimates appearance and never diagnoses; for anything one-sided, sudden or itchy, see a dermatologist.