very Dark underarms and thighs..Pls help with some remedies which have worked for u..

Dear frnds,

I have very dark underarms and dark in my thigh areas too..Thigh b'cos i have put on lot of weight especially in the thighs and when i walk it causes darkness due to friction.. Im exercising now but still need some remedies to reduce the darkness..

And the climate is so hotttt i feel like wearing sleeveless but have very dark underarms ...Is there anything to overcome this.... Can we apply bleach..(The bleach we apply for face..) Got something called Natures gold bleach cream.. Is it safe to apply it in the thighs and underarms or any other remedies.. I have read that turmeric reduces but i have only the turmeric which we use for cooking..