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.
Sometimes called âallergic shinersâ, dark under-eye circles are usually caused by allergies. When the nose is blocked, blood might not be able to flow through. This expands and darkens the veins that drain from the eyes to the nose. Congestion can also cause blood to sit in the area under the eyes. Often, doctors cannot find a cause for your childâs under-eye circles. Other causes may include: chronic sinus infections. enlarged adenoidsâ, causing nose blockage. eczema. heredity: dark under-eye circles can run in families.