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Skin & hair

Under-Eye Dark Circles: What Causes Them and What Actually Helps

Under-eye dark circles have three main causes: excess pigment in the skin, visible blood vessels showing through thin skin, or a hollow under the eye that casts a shadow. Effective treatment depends on identifying which type you have — a dermatologist can match the cause to a proven option.

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Nina Osei, NP — Nurse Practitioner

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Why do the same dark circles come from such different causes?

The under-eye area has some of the thinnest skin on the human body — typically less than one millimeter. That thinness means that anything happening just beneath the surface, whether a buildup of melanin pigment, pooling blood in small veins, or a loss of the fat pad that cushions the lower eyelid, can show through clearly 1.

Researchers and clinicians now broadly classify periorbital dark circles into three main types [1, 2]:

  • Pigmented: A brown or tan discoloration from excess melanin in or just under the skin, most common in people with medium to deep skin tones.
  • Vascular: A bluish or purplish tint from blood pooling in fine vessels visible through thin skin, often worsened by fatigue or nasal congestion.
  • Structural (tear trough): A literal shadow cast by a groove — the tear trough — that forms as the fat pad beneath the lower eyelid thins with age, making the area appear sunken.

Many people have more than one type at the same time, which is part of why a single cream rarely fixes the problem for everyone.

What makes dark circles worse?

Several overlapping factors drive or deepen each type.

Sleep and fatigue. Poor sleep dilates blood vessels and reduces circulation, making vascular-type circles more visible through the thin periorbital skin 1. This is why circles that look noticeably worse after a bad night are usually vascular.

Allergies and nasal congestion. Allergic rhinitis causes a well-recognized pattern sometimes called allergic shiners. When inflammation swells the nasal mucosa, it slows venous blood returning from the periorbital region; the pooled deoxygenated blood appears dark through the overlying skin 2. Treating the underlying allergy often helps more than any topical product.

Sun exposure. Ultraviolet light accelerates melanin production in the periorbital skin, worsening pigmented circles — particularly in people with naturally deeper skin tones 1.

Aging. With age, the fat pad under the lower eyelid gradually thins and collagen declines. This creates the structural hollow (tear trough) that casts a shadow; topical products have diminishing returns against a structural problem 2.

Genetics. Tear-trough anatomy and a tendency toward periorbital hyperpigmentation are often inherited 1. Circles that have been present since childhood or that run in families have a strong constitutional basis and are harder to fully reverse.

Skin rubbing. Habitual eye rubbing from itching — a common pattern with eczema or allergies — triggers post-inflammatory hyperpigmentation over time 1.

Medications. Some topical glaucoma drops (including bimatoprost) can deepen periorbital pigmentation as a known side effect. Systemic vasodilators may make vascular circles more noticeable 1.

Which treatments have a real track record?

A 2021 systematic review of 39 studies found that the most effective approach depends strongly on which type of dark circle is being treated 3. Soft tissue fillers perform best for structural hollowness; topicals and peels are most relevant for pigmentation; lasers and combination therapies produce the broadest results across types 3.

For pigmented circles: Topical agents that gradually inhibit melanin production are the first-line approach. Well-studied options include vitamin C (ascorbic acid), kojic acid, niacinamide, retinoids, azelaic acid, and tranexamic acid [1, 3]. These work slowly — expect weeks to months before visible change — and their effect is amplified by consistent daily sunscreen use. Niacinamide in particular has a growing evidence base for periorbital hyperpigmentation as part of multi-ingredient formulations 4. Chemical peels can accelerate the removal of surface pigment, though they carry a higher risk of post-inflammatory hyperpigmentation in people with deeper skin tones and require an experienced clinician.

For vascular circles: Caffeine-containing eye creams may provide modest temporary vessel constriction. Topical vitamin K is sometimes included in eye products for this purpose, though high-quality clinical data are limited. The most impactful intervention for allergy-driven vascular circles is managing the allergy itself — antihistamines, nasal corticosteroids, or allergen avoidance — rather than any topical eye product 2.

For structural hollowness (tear trough): Topical products do very little because the problem is volume loss, not pigment or vessels. Injectable hyaluronic acid fillers placed by a trained clinician address the hollow directly. A 2023 systematic review and meta-analysis of 31 studies involving 2,556 participants found a pooled patient satisfaction rate of 91% and a low rate of serious complications 5. The most common side effects — swelling and bruising — were transient 5. Results are temporary, typically lasting several months to two or more years depending on the product.

Platelet-rich plasma (PRP): Injected PRP is an active area of research. A 2022 split-face randomized study found PRP outperformed carboxytherapy on melanin reduction in periorbital hyperpigmentation 6. Evidence remains promising but less established than fillers or established topicals.

Laser and light devices: Various lasers (Q-switched Nd:YAG, ruby, pulsed-dye) and intense pulsed light (IPL) can target either pigment or vascular components. They require careful patient selection; deeper skin tones face a meaningfully higher risk of post-inflammatory hyperpigmentation from aggressive settings 3. These procedures should be performed by a clinician with experience treating diverse skin tones.

What can you do at home while you pursue a longer-term approach?

Consistent habits make a real difference in preventing worsening and supporting any treatment:

  • Sunscreen every morning. Apply SPF 30 or higher under and around the eye area. Sun protection both slows pigmented circles and makes topical brightening agents more effective.
  • Treat allergies if they are a trigger. If your circles worsen during allergy season or alongside nasal symptoms, addressing the allergy often does more than any eye cream.
  • Prioritize sleep. Not because poor sleep alone causes circles, but because vascular circles are reliably more visible when you are fatigued.
  • Stay hydrated and limit alcohol. Dehydration and alcohol temporarily worsen a dull, sunken appearance.
  • Cold compresses. Chilled compresses or cool spoons briefly constrict vessels and reduce puffiness. The effect is temporary but real.
  • Concealer strategy. Color-correcting concealers (peach or orange tones neutralize blue-purple circles; yellow tones neutralize brown circles) applied before a skin-matched concealer give the most natural result. This does not treat the underlying cause, but meaningfully improves day-to-day appearance.

When should you see a dermatologist or cosmetic clinician?

For most people, dark circles are purely a cosmetic concern and there is no urgency. A dermatologist or cosmetic clinician adds real value when:

  • You want to know which type of dark circle you have — the answer determines which treatments are worth trying.
  • Topical products have not worked after several months of consistent use.
  • You are considering procedural options (fillers, lasers, PRP) and want guidance matched to your skin tone and anatomy.
  • You have a deeper skin tone and are concerned about the risk of post-inflammatory hyperpigmentation from more aggressive treatments — this is a legitimate safety concern that requires an experienced clinician 3.

Some questions worth bringing: Which type do I have? Given my skin tone, which treatments carry the lowest risk? How long before a topical treatment shows meaningful results? What realistic improvement can I expect from fillers versus lasers versus topicals?

Common questions

Do dark circles mean something is medically wrong?

In most cases, no. The overwhelming majority of dark circles are a cosmetic issue related to pigmentation, visible blood vessels, or facial anatomy. They are not a sign of a serious health condition. Rarely, circles accompanied by sudden one-sided swelling, eye pain, or vision changes may warrant evaluation by a clinician.

Why do cold spoons or cucumber slices help temporarily?

Cold temperature briefly constricts blood vessels and reduces puffiness, making vascular and swelling-related circles less visible for a short time. The effect is real but short-lived — it does not address the underlying cause.

Can eye creams really reduce dark circles?

For pigmented circles, topical ingredients like vitamin C, niacinamide, kojic acid, and retinoids can gradually reduce melanin with consistent use over weeks to months. For vascular or structural circles, most eye creams offer modest or temporary benefit. No topical reverses volume loss — that requires a procedural approach.

How long do tear trough fillers last?

Results vary by product and individual, but hyaluronic acid tear trough fillers typically last from several months to around two years. A 2023 meta-analysis found high patient satisfaction and a low serious complication rate across studies.

Are dark circles worse if you have allergies?

Yes, for many people. Allergic rhinitis causes nasal mucosal swelling that slows venous drainage from the periorbital area, causing blood to pool and darken the under-eye skin. This pattern — sometimes called allergic shiners — is one of the more common and underappreciated drivers of dark circles.

Talk to a clinician

Nina Osei, NP — Nurse Practitioner

checkups, refills & skin. Gale can match you with a licensed clinician for a visit.

Find care →

When to contact a clinician

  • —Swelling under only one eye, especially if it comes on suddenly or is not explained by a known injury
  • —Eye pain, redness, or changes in vision alongside new or worsening under-eye discoloration
  • —A new lump or area of firmness in the under-eye area
  • —Rapidly progressive darkening not explained by sleep changes, allergies, or medication

This article is general health information, not a diagnosis or personalized treatment recommendation. Dark circles have several different causes, and the right approach depends on your individual anatomy, skin tone, and history. A licensed dermatologist or cosmetic clinician is the appropriate person to evaluate and advise you.

References

  1. 1.Sarkar R, Ranjan R, Garg S, Garg VK, Sonthalia S, Bansal S (2016). Periorbital Hyperpigmentation: A Comprehensive Review. Journal of Clinical and Aesthetic Dermatology. PMID 26962392 ✓Classification of dark circles (pigmented, vascular, structural, mixed); etiological factors including UV exposure, genetics, rubbing, medications, aging, and vascular mechanisms
  2. 2.Pissaridou MK, Ghanem A, Lowe N (2021). Periorbital Discolouration Diagnosis and Treatment: Evidence-Based Review. Journal of Cosmetic Laser Therapy. doi:10.1080/14764172.2021.1899238 ✓Etiological classification of dark circles including shadowing, vascular, idiopathic hyperpigmentation, post-inflammatory hyperpigmentation, and constitutional types; allergic shiners mechanism via nasal venous congestion
  3. 3.Michelle L, Pouldar Foulad D, Ekelem C, Saedi N, Mesinkovska NA (2021). Treatments of Periorbital Hyperpigmentation: A Systematic Review. Dermatologic Surgery. doi:10.1097/DSS.0000000000002484 ✓Comparative effectiveness of treatments by circle type; soft tissue fillers most effective for structural/volume-loss type; topicals and peels for pigmentation; lasers and combination therapies for mixed types; risk of post-inflammatory hyperpigmentation in darker skin tones
  4. 4.Boo YC (2021). Mechanistic Basis and Clinical Evidence for the Applications of Nicotinamide (Niacinamide) to Control Skin Aging and Pigmentation. Antioxidants (Basel). doi:10.3390/antiox10081315 ✓Niacinamide's mechanism and clinical evidence for periorbital and general hyperpigmentation treatment
  5. 5.Liu X, Gao Y, Ma J, Li J (2023). The Efficacy and Safety of Hyaluronic Acid Injection in Tear Trough Deformity: A Systematic Review and Meta-analysis. Aesthetic Plastic Surgery. doi:10.1007/s00266-023-03613-7 ✓Meta-analysis of 31 studies / 2,556 participants; pooled patient satisfaction 91%; transient swelling and bruising as most common side effects; low rate of serious complications
  6. 6.El-Tahlawi SM, Fawzy MM, El Maadawi Z, Yasen SM, Aboraia NM (2022). Platelet-rich plasma versus carboxytherapy in the treatment of periorbital dark circles: A split-face study. Journal of Cosmetic Dermatology. doi:10.1111/jocd.15051 ✓PRP showed 46.6% improvement in melanin reduction vs 14.3% for carboxytherapy; PRP more effective and better tolerated in randomized split-face study

6 sources, numbered by first appearance. General health information, not medical advice — synthetic demonstration content.