I pricked my finger with a pin 2 weeks ago and now the area where the pin pricked me turns white when wet?

i pricked my finger with a pin 2 weeks ago and now the area where the pin pricked me turns white when wet. i noticed this this morning as i took a shower, the area where i got pricked with the sewing pin turns white, i white, or more like very pale spot, 1 mm exactly where i got pricked... what could this be?