How To Get Rid Of Hyperpigmentation On Inner Thighs And Pubic Area?

Hi..am 27 year old female..my inner thighs n groin region is hyperpigmented n I have black spot like things on my hips..they are Lyk pimples bt not n dey do not hurt...plzzz can u suggest me what to do...I think it is acanthosis nigricans..!!I wanna get rid of d pigmentation...and my vagina is also darkened..is it normal? ??suggest with home remedies for pigmentation..I also had a rash on inner thighs few years back due to dat pigmentation appeared and I also wanna get rid of dat pigmentation...plzz suggest..