Cancer cells divide more quickly than healthy cells, and chemotherapy drugs effectively target those cells. Unfortunately, fast-growing cells that are healthy can be damaged too. There are many different chemotherapy drugs with the potential for many different side effects.
Symptoms & Signs. Dark circles under the eyes are a common complaint of both men and women, although they can occasionally be seen in children. As people age, the skin becomes thinner and collagen is lost, sometimes enhancing the appearance of blood vessels beneath the eyes and making the area appear darker.
What Causes Ordinary Puffy Eyes and Dark Circles Under the Eyes? Ordinary swelling around the eyes means you have an excessive accumulation of fluids, called edema, in surrounding skin tissue. Because the skin around the eyes is the thinnest skin in the body, swelling and discoloration can be quite prominent.