And as a practical matter, it doesn't really clarify the pronunciation of Nguyen unless one knows which English pronunciation of ng you're referring to. I'm just teasing with this pedantry, of course; I understood what you meant. But then, I already knew how to pronounce Nguyen.
What are bruises? Bruises are bluish or purple-coloured patches that appear on the skin when tiny blood vessels, called capillaries, break or burst underneath. The blood from the capillaries leaks into the soft tissue under your skin, causing the discolouration.
Dark circles under the eyes are most often caused by allergies, illness, a lack of sleep, or heredity. If your dark circles are caused by heredity, you may find that they are almost impossible to completely eliminate. In the morning, wash your face with cold water to help blood vessels constrict.