Types of Dark Circles: Pigment, Vessel or Shadow

Dermatology does not sort dark circles by color alone. The classification in current use, from a clinical analysis by Huang and colleagues and summarized in a review in the Journal of Clinical and Aesthetic Dermatology, has four categories based on pattern of pigmentation and vasculature: pigmented, vascular, structural and mixed. Color is a clue to which one you have, not the label itself.

The four categories

Type	How it looks	What is underneath
Pigmented (P)	Infraorbital brown hue	Melanin in the skin of the lid
Vascular (V)	Blue, pink or purple, sometimes with puffiness	Venous plexus visible through thin skin
Structural (S)	Skin-colored, reads as a hollow	Shadow from contour: tear trough, fat loss, bone, lid bags
Mixed (M)	Two or three of the above at once	Any combination, including all three

The review notes three named mixed subtypes — pigmented-vascular, pigmented-structural and vascular-structural — plus the combination of all three. Mixed is not an edge case; it is the usual finding once you look for more than one mechanism.

Shadow or pigment: pull the skin and look

Manual stretching of the lower eyelid skin separates true pigmentation from a shadow effect. Pigment retains its appearance under tension. Shadow improves or resolves entirely, because you have flattened the contour producing it. It takes seconds, needs no equipment, and it decides whether a lightening cream has any chance of working on your face — a cream applied to a shadow is treating something that is not there.

How the types are distributed

A study of 100 patients with periorbital melanosis, evaluated clinically and with dermoscopy, found the constitutional type in 77 patients and the post-inflammatory type in 12, with vascular and shadow forms accounting for 6 and 5. On dermoscopy the split was different and more revealing: 52 patients showed a pigmentary pattern, 15 a vascular pattern, and 33 a mixed pigmentary-vascular pattern. In other words, a third of the group had a vascular component that the clinical impression alone had not attributed to them.

The same study recorded a positive family history in 17% and identified cell phone use of more than four hours and refractive error as its most common risk factors, at 38% each, with stress and respiratory allergy significantly associated.

Where allergy fits

Allergic shiners are usually vascular in origin. StatPearls attributes them to venous congestion in the infraorbital groove, drainage backing up through the sphenopalatine veins toward the pterygoid plexus. That gives them a bluish cast, a tendency to fluctuate with the season or the allergen, and a habit of arriving with a nasal crease and lid folds. Years of rubbing then adds a post-inflammatory pigmented layer on top of the vascular one. This pattern dominates in dark circles in children.

Why the type decides the treatment

Depigmenting agents and peels target melanin, and do nothing for a shadow. Fillers restore volume in a tear trough, and do nothing for pigment. Vascular circles respond to different laser wavelengths than pigmented ones. Reviews are explicit that the classification exists precisely so treatment can be matched to type — the options are set out in how to reduce dark circles, and the mechanisms behind each type in dark circles under eyes causes.

This content is informational and does not replace consultation with a dermatologist.