Almost everyone develops dark circles under their eyes at some point. Though they’re rarely a sign of anything serious, they can be aesthetically irritating and give the appearance that one is tired all the time. Depending on skin color, the bags can appear blue, purple, brown, or black. Many factors affect the appearance of dark circles, and they may indicate an underlying medical issue or a need for lifestyle changes.
For many people, dark circles are hereditary. A 2016 study found many genetic reasons for the circles. One cause is the collection of blue or grey melanocytes in the skin under the eyes, which look similar to shadows. Some people have prominent blood vessels in their lower eyelids and the skin underneath the eyes. In combination with thin skin, this can also cause dark circles. Most hereditary causes of dark circles have no treatments.
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