Dark Circles often tend to age the appearance of a person more than the wrinkles or gray hair. The skin around the eye is very delicate. Various factors ranging from allergies to mental stress can easily affect this part of the skin to produce dark circles.
They are often the result of some combination of the following: lack of sleep, chronic stress, menstrual disorders, pregnancy, poor diet and medications. For others, dark circles are a hereditary trait. People who suffer from allergies and sensitivities often have a bigger problem with dark circles as well.
The good news is that they are temporary and not a medical concern unless they are hereditary.