Medically reviewed guide · Last updated: 1 September 2026 · Reading time: approx. 9 min

Dark Circles Under the Eyes: Genetics, Lack of Sleep or Iron Deficiency?

The most common causes compared

The causes in detail

The skin under the eyes is among the thinnest on the body. Beneath it lie a dense network of veins, the ring-shaped muscle around the eye and pads of fat. How much of this shows through, how much pigment the skin produces and how light falls on the shape of the face determine whether dark circles are visible and how clearly. Specialists speak of periorbital hyperpigmentation when the discolouration consists mainly of pigment.

Disposition: the most common reason

For many people, dark circles simply run in the family. Darker skin types tend towards brownish, pigmented circles; very fair, thin skin lets the bluish network of veins shimmer through; and the inherited shape of the eye area helps decide whether a tear trough casts a shadow. These circles are often already there in adolescence, vary little and have no medical significance. First step: none needed — unless they bother you. Then it helps to know your type (see the self-tests).

Lack of sleep and exhaustion

After short nights the skin looks paler and the circles stand out more, often with puffy eyelids in the morning. To be honest, though, lack of sleep is rarely the only cause: if you have dark circles despite getting enough sleep, you usually have a different type. Persistently poor sleep is still a topic in its own right — you will find an explanation and help under sleep disorders, and with lasting exhaustion also under fatigue.

Allergy and a blocked nose: "allergic shiners"

With allergic rhinitis, the lining of the nose swells and obstructs drainage from the veins around the nose and eyes. The blood pools, and the skin over it looks bluish-grey. On top of that comes the rubbing of itchy eyes, which builds up pigment over time. Typical are circles that are stronger in the pollen season or in the morning after a night with a blocked nose; in children with allergies they are often particularly noticeable. People with atopic eczema also often have an extra fold under the lower lid. First step: have the allergy assessed and treated — this improves the nose and often the circles too.

Structure and age: shadow instead of colour

Over the years, the skin and fat pads under the eye lose volume and elasticity. A groove forms between the lower lid and the cheek (tear trough), or fatty tissue bulges forward as an eye bag. Both cast a shadow that looks like a ring but is not a discolouration of the skin. First step: neither creams nor sleep help here. If it bothers you a lot, advice from a dermatologist or a plastic surgeon is the right route.

Iron deficiency and anaemia: the indirect route

The question "Are dark circles a sign of iron deficiency?" is one of the most common on the subject. The honest answer: there is no direct, well-established link. Iron deficiency anaemia does make the skin paler, though — and on pale skin, existing vascular shadows stand out more clearly. You should take notice if other signs appear: paleness, exhaustion, shortness of breath on exertion, brittle nails, hair loss or cracked corners of the mouth. First step: have your blood count and ferritin (iron stores) checked at your GP practice — and look for the cause of the deficiency, such as heavy periods or unnoticed blood loss.

Rare medical causes

Rarely, thyroid or kidney disease (swelling around the eyes), an inflammatory muscle disease (purple upper eyelids) or clotting disorders (bruising without injury) are behind it. In that case other symptoms are almost always in the foreground — see the warning signs.

Self-tests: first clues at home

These tests do not replace a diagnosis, but they help you work out your type — and so judge what can help and what is a waste of money.

• The colour test: look in the mirror in daylight. Brownish points to pigment, bluish-purple to blood vessels showing through, and grey without any real colour more to a shadow.
• The stretch test: gently pull the skin under the eye to the side. If the colour stays unchanged, pigment is mainly involved. If it changes noticeably, blood vessels are more likely to play a part.
• The light test: shine a lamp directly onto your face from the front or lift your chin slightly. If the ring largely disappears, it is a shadow cast by the shape of your face.
• The progress test: are the circles clearly better after two weeks of enough sleep? Worse in the pollen season? More swollen in the morning than in the evening? Note it down over two to three weeks.
• The family and accompanying-signs check: if your parents or siblings have similar circles, that points to disposition. If paleness, exhaustion, breathlessness on exertion or new bruises are added, a blood count is called for.

Warning signs: when not to wait

• Bruising around both eyes after a fall or a blow to the head, especially with headache, feeling dazed, vomiting or clear fluid from the nose or ear
• A red, painful swelling around one eye with fever, visual disturbance or pain when moving the eye
• Bruising around the eyes without an injury, together with pinpoint bleeding, bleeding gums or nosebleeds
• Dark circles with marked paleness, breathlessness on exertion, a racing heart or unintended weight loss
• Purple discolouration of the upper eyelids together with new muscle weakness or a skin rash
• Newly bulging eyes, eyelid swelling and double vision, or swelling of the eyelids and legs with foamy urine

The treatment pathway: step by step

Without warning signs, dark circles are a cosmetic matter. The pathway depends on how much they bother you — and which type you have.

1. Remove the things that make them worse. Regular sleep, daily sun protection, no rubbing, less alcohol and salt in the evening, no smoking. Cool compresses in the morning ease swelling — in the short term.
2. Check for underlying causes. With signs of allergy: allergy testing and treatment. With accompanying signs such as paleness or exhaustion: blood count, ferritin and, depending on the situation, thyroid values at your GP practice.
3. Skincare with realistic expectations. Creams with vitamin C, retinoids or azelaic acid can slowly lighten pigment; the evidence is limited, the effect rather moderate, and the skin around the eye is sensitive. Caffeine or vitamin K creams work temporarily, if at all.
4. Dermatological treatment. With marked pigment: prescription lightening agents, peels or laser — usually self-pay services not covered by statutory health insurance, with risks such as irritation or new pigment spots.
5. Aesthetic procedures for shadows. Hyaluronic acid filler in the tear trough, or an eyelid lift for eye bags. Very rarely, fillers near the eye lead to blocked blood vessels with loss of vision — so only have them done by experienced doctors.
6. Cover up pragmatically. A colour-correcting concealer (with a peach or orange tint for bluish circles) is often the most effective and lowest-risk solution. Which medical treatment makes sense is decided by the practice treating you.

The medication angle: when treatment shows up under your eyes

Some medicines discolour the eye area directly, while others make the skin thinner, encourage bruising or rob you of sleep.

Prostaglandin eye drops for glaucoma

Active substances such as latanoprost, bimatoprost or travoprost reliably lower the pressure inside the eye in glaucoma. Known side effects: darker eyelid skin, longer eyelashes, a permanent brown discolouration of the iris (especially in eyes of mixed colour) and a loss of fatty tissue around the eye that makes the eyes look more deep-set. The skin discolouration usually fades after stopping, but the iris colour does not. Wiping excess drops off the eyelid skin can reduce the discolouration. Important: never stop glaucoma drops on your own initiative — damage to the optic nerve cannot be reversed. How medicines affect the eyes is explained in the guide Medications and your eyes.

Cortisone creams and blood thinners

With longer use, cortisone creams make the thin skin around the eyes even thinner, and blood vessels show through more. On the eyelid they also carry a risk of raised eye pressure and cataracts — so use them only on medical instructions and for as short a time as possible (see the cortisone guide). Anticoagulants and antiplatelet medicines such as aspirin (ASA) make bruises appear more easily, including around the eyes.

Nasal sprays: help and trap at the same time

With allergic dark circles, cortisone nasal sprays such as mometasone and antihistamines are often a sensible treatment, because they reduce the swelling in the nose on a lasting basis. Decongestant sprays with xylometazoline are a different matter: if used for longer than about a week, the lining of the nose swells up all the more afterwards — the nose stays blocked, and so do the circles. More on this under nasal spray dependence.

Sleep thieves and painkillers

Cortisone in the evening, water tablets late in the day, some antidepressants, beta blockers, stimulants and decongestant cold remedies can disturb sleep — and so indirectly make dark circles worse. Often a different time of taking them, set by the practice, is enough. Painkillers such as aspirin, ibuprofen or diclofenac also increase the tendency to bleed; bought over the counter, they should generally not be taken for longer than three to four days in a row or on more than ten days a month without medical advice.

Iron supplements: only with a confirmed finding

Iron supplements help with a confirmed deficiency — against dark circles without a deficiency they do not help. They often cause nausea, constipation and dark stools and reduce the absorption of other active substances, such as thyroid hormone, certain antibiotics and osteoporosis medicines. That is why a time gap is needed, which the practice or pharmacy will set. Background in the guide Iron deficiency.

How to prevent dark circles

• Sleep regularly — fixed times are more effective than an occasional lie-in at the weekend.
• Sun protection right up to the lid margin — a sunscreen that is gentle on the eyes and a pair of sunglasses slow down pigment formation.
• No rubbing, treat the allergy — every bit of rubbing encourages pigment; a well-treated allergy takes away the itch.
• Stop smoking and drink less alcohol — both improve sleep quality and the appearance of your skin.
• Low salt in the evening, head slightly raised — this can reduce morning swelling under the eyes.

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