If you're wondering what causes dark circles around your eyes, you're definitely not alone.
This is a problem millions of people are faced with on a daily basis.
And while there is no real one definitive answer, there is one broad answer, and that is this: Dark circles around your eyes are caused by compromised health in one area or another.
If I were to break this down into smaller, more specific pieces, I would assert that the following causes are most often the cause of dark circles around your eyes:

• Acid build-up in the blood and tissues
• Lack of sleep
• Intense or prolonged stress
• Age
• Heredity
• Hormonal changes due to pregnancy, menopause, trauma, etc.
  

To combat these ailments, thereby reducing or even eliminating the dark circles around your eyes, the three easy steps I'm about to share with you should prove themselves extremely valuable to you.
This will work for anyone who applies it...
Dark Circles Around Your Eyes - 3 Ways To Fight It:

1. Turn acidity into alkalinity.
   This comes down to basic lifestyle choices.
   If you smoke, quit.
   If you drink loads of alcohol, quit.
   Drugs and other chemicals should be avoided to the best of your ability, as should excessive amounts of cooked, dead foods, processed foods, refined sugar, table salt, and white flour.
   You know the drill! Fresh fruits and veggies & at least 3 liters of purified water every day.
   This will work wonders for your health, and should make those dark circles disappear in no time!
2. Worry, anxiety, stress, anger, pessimism, and other forms of unhealthy, painful emotions can be avoided, and they should.
   Relax.
   Focus on the good stuff.
   Smile.
   Take a hot bath and drink some chamomile tea.
   And for the love of your health, as well as your appearance, get some sleep! 6 hours uninterrupted, minimum! It's good for you, and it will show!
3. For issues pertaining to heredity, age, or naturally occurring pigmentation issues, a good eye cream can work wonders.
   There are a few criteria any eye cream should meet to be considered, however.
   Make sure it's natural, and that it contains ingredients such as N-hydroxycicinimide and Chrysin, two ingredients which reduce the appearance of excess skin pigmentation.
   Also, if your eye cream is proven to reduce or eliminate dryness, puffiness, lines, wrinkles, swelling, and irritation around the eyes, you will be WAY ahead of the game!