Thanks for the query.
You can try hair removal
creams, waxing etc.
You have to select mild creams to avoid irritation over the area.
Trimming the hair instead of removal is one more option.
To decrease the darkness you can use creams containing aloevera
, vitamin E
If the darkness still persists once consult gynecologist and get examined to rule out possibilities like fungal infection
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429