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When you are tired for an extended period of time and are entirely sleep-deprived, the skin under your eyes becomes pale.
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With age, the skin in this area thins even more, letting the blood vessels protrude and resulting in dark circles.
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Genetics and heradity can also play a role in the development of dark circles.
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Check your iron levels. A lack of it might result in a darker under eye region. The most prevalent type of anaemia is iron deficiency.
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Any ailment that causes irritation in the eyes may result in dark circles.
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Poor diet can also cause dark circles beneath the eyes.
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Drinking and smoking can also produce dark circles beneath your eyes since they induce water loss from the body.
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Overexposure to the sun causes skin pigmentation and dark bags beneath the eyes.
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Hormonal changes during menstruation and pregnancy affect the skin, and one of the side effects is an under-eye black circle.
Credit - Google Images
Credit - Google Images