Having dark eye circle makes you look tired and jaded, which leads to a less favourable first impression.
Poor microcirculation of the blood and lymphatic system around the eye. They appear bluish/purplish. This is especially obvious in allergic rhinitis with congested nose and slow lymphatic drainage around the eyes.
Accumulation of melanin (skin pigment) due to sun exposure. As the skin is very thin around the eyes, any excess pigments will cause dark circles to be obvious.
Due to the nature of bone structure. The shadowing and indentation arising from deep sunken eye socket can produce a prominent tear trough, thus making dark circles more apparent.
Tear trough is the sunken area extending from the inner corner of lower eye lid, towards the mid cheek.
Filling up the tear trough with filler is the most effective way of treating dark eye circles. Using eye cream is not as effective because no matter how much eye cream is applied, the root problem is not solved.