A glass of wine too many will reduce the levels of oxygen in your blood. When your blood lacks oxygen, it flows more slowly and is darker in colour.
Darkened blood vessels become visible through the fine skin under your eyes, which can cause dark circles to appear.
2. AN UNBALANCED DIET
If your body lacks vitamin C, iron or zinc from nutritious foods, the first signs of the deficiency may be dark circles under your eyes.
3. HAY FEVER
If you tend to rub your itchy eyes when hay fever strikes, you could be irritating the sensitive skin around your eyes and causing dark circles.
4. COMPUTER SCREENS
Dark circles can pop up when your eyes are strained from staring at a computer screen for too long.
When your body is stressed your blood rushes to help your main organs, rather than to your face. This can leave your face looking drained and pale.
The contrast between the skin under your eyes and the rest of your face can make the dark circles under your eyes more noticeable.