CAUSES OF DARK CIRCLES

Dark circles are generally inherited by people. If you have dark circles, there is a good chance that others in your family also have them. The skin under the eye is very thin. When blood passes through the large veins close to the surface of the skin it can produce a bluish tint. The more transparent your skin the darker the circles appear. Some of the reasons of under eye dark circles are as follows.

Excessive exposure to the sun
Excessive exposure to sun can cause formation of higher levels of melanin under the eyes. People get dark circles because excessive exposure to the sun increases the production natural pigmentation and brings that pigmentation to the surface which appears as dark circles.

Allergies Asthma and Eczema
Any condition that you have that causes your eyes to itch can contribute to darker circles under the eyes because rubbing or scratching the skin can darken the skin. Some food allergies can also cause the area under the eyes to appear darker.

Medicines
Some medicines tend to dilate the blood vessels and that can cause circles under the eyes to darken. Because the skin under the eyes is very delicate, any increase blood flow shows through the skin.

Nutrition
Deficieny of certain nutrients in the diet can also contribute to the formation of dark circles around the eyes.

Fatigue
Lack of sleep or excessive tiredness can cause paleness of the skin, which again allows the blood underneath the skin to become more visible and appear more blue or darker.

Pregnancy or Menstruation
The skin can also become more pale during pregnancy and menstruation, which again allows the underlying veins under the eyes to become more visible.

Age
As you grow older, dark circles become more noticeable and permanent. Excess folds of skin under the eyes will also make dark circles more pronounced.