The reason veins appear to be blue on some complexions isn’t because the blood inside them is blue it’s because your skin or subcutaneous tissue only lets blue wavelengths of light pass through it. This skin around your eyelids, called peri-orbital skin, is on average about 0.5 mm thick compared to an average of about 2 mm thick on most of the rest of your body. Simply put, dark circles are a result of the thin layer of skin below your eyes showing the blood vessels and the blood they contain more clearly than anywhere else on your body, so can be affected by blood flow. As such, eye puffiness can also simply be a result of old age, just as we might become more aware of wrinkles, or the odd crow foot.
The result: dark under-eye circles appear more prominent. This can place increased pressure on the skin and blood vessels around the eyes, affecting blood flow and forcing blood vessels closer to the surface of the skin. If you do suffer from allergies, or have ever had an allergic reaction, you're probably very aware of this. In some people, this is caused by fluid buildup below the eyes, either due to illness, medical treatment, allergies or excessive salt consumption, which can result in the body retaining more fluid than usual. Sometimes the blood vessels around your eyes can get damaged, blood leaks out, and you’re left with puffy dark circles or a puffy eye. While not much can be done to change your genes, a number of things, including a good skin care routine, can be done to prevent the area around the eyes from looking even darker.Īnother problem that goes hand-in-hand with dark circles is eye puffiness, aka bags below your eyes. Some people will simply have dark circles around their eyes thanks to their genes. Tiredness, working too hard or even just staying up late can cause dark circles, but it can also be down to genetics.
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