The surname Nguyen is believed to have originated in the Chinese surname Ruan (in the Mandarin language) or Yuen (Cantonese), owing to Chinaâs long domination over Vietnam.
Tinea nigra is a fungal infection that is mainly seen on the palms of the hands or soles of the feet causing a dark brown to black discoloration of the affected skin. The word tinea means a fungal infection and nigra means black.
There are several possible causes of brown toenails. Repetitive trauma (like running in a shoe that is too small, for example) can make the area under the nail bleed, causing a subungual hematoma. Also, certain myotic infections (fungal infections) can cause the underside of the nail to gather fungal debris of a brown or clack color. Women of color may get dark stripes or dark areas in their nails that are completely normal.