![]() The face detection feature of this phone makes it easy for you to remove dark circles under your eyes, remove unsightly blemishes from your skin, and even customize your face (think higher cheekbones, higher nose, firmer faces). So if we humans get dark under the eyes, it's a way of telling other humans that we're tired.Love taking selfies but wish you don't have to fall back on Photoshop so much? Let's face it, we all want to look good on our profile pictures but a Read more Perfect365 (Free) Eyes in animals are an important signalling area. And finally, not a reason but an observation. Third, when you get dehydrated (which sometimes happens when you get tired), the skin under the eyes gets dark. These Mast Cells will release histamine (sometimes by themselves, and sometimes when you rub them), which will cause swelling under the eyes - and darkness. Second, you have huge numbers of Mast Cells in the skin under the eyes. This is one factor that will give you dark half-circles under the eyes. That drainage is a lot better when you're lying down than when you're standing up - so the blood tends to pool there. The skin under the eyes is very thin, and almost transparent - so it will show any colour changes in the layers underneath very easily.įirst, the blood supply from that skin drains into the internal jugular vein. But we do have a bunch of partial answers. The short answer is that nobody has done a lot of research in this area, so we don't have one single definite answer. Why do you get dark rings under your eyes, when you're tired? (You will need Real Audio which you can download for free) Listen to Karl talk about Bags Unders The Eyes Science Home News in Science In Depth Dr Karl TV & Radio Games Teachers Kids Get Involved Video Audio Photos RSS/Pod
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