Dark circles under your eyes can be a sign of a vitamin deficiency "Vitamin K" or can be caused by aging and a loss of collagen when your skin becomes thinner.
Certain medications and a lack of sleep can also cause dark circles under your eyes.
You can use lemon juice and a cotton ball to get rid of dark circles under your eyes.
Take a lemon and cut the lemon in half and squeeze the lemon juice out onto the cotton ball and then apply the lemon juice to the dark circles for at least 10 minutes and then wash the lemon juice off.
You may have to apply the lemon juice for a week or more but the dark circles should start to disappear.
Frozen wet tea bags placed over the dark circles can also help to get rid of dark circles.