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.
Here's a list of the most common causes. Dark circles run in families for a number of reasons. When blood passes through the veins under your eyes (where the skin is very thin), dark circles can appear. If your skin is more transparent (an inherited trait), the circles will appear darker.