According to the International Journal of Dermatology, there are four types of dark circles: pigmented, vascular, structural, and mixed type. Pigmented dark circles are brown, while vascular dark circles have a blue/pink/purple undertone and may or may not be puffy (via DocOnline). Pigmented dark circles are a result of excess melanin under the eye, while vascular dark circles are present in those with poor blood circulation and/or transparent skin under the eyes (per Get Healthy Skin). Those who have deeper set eyes, or experience a loss of fat in the undereye-area could experience structural dark circles from the appearance of shadows. Mixed-type dark circles are dark circles that are any combination of the three previous types.
To find out what type of dark circle you might have, a simple trick is to gently pinch your undereye skin and shift it around so you can see the undertone of the skin in that area (per Southern Living). If your undereyes have a bluish or brown undertone to them that moves with the skin, then you are likely suffering from pigmented dark circles. On the other hand, if your undereyes have a bluish tint that fades away as you pinch your skin, then that could mean that you're dealing with vascular dark circles.
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