What are dark circles and why do they occur?
It’s not surprising that the eyes are the first to be affected by: the skin under the eyes is very thin, as it doesn’t have the usual layer of fatty tissue. Instead, there are lots of little blood vessels and lymph glands. If the body lacks oxygen or fluid, the blood flows more slowly and is darker in colour. Blood vessels are visible through the fine, almost transparent skin beneath the eyes. Depending on your skin type, the shadows under your eyes will either be brownish or blueish. In some families, dark circles are genetically determined: this means that particularly fine skin around the eyes has been passed on by your genes.