Cracked And Black Colour on Buttocks.

Doctor Kindly Can You Please Prescribe or Suggest a Good Tablets And Soap For Removing Cracked Skin, Melasma and Dark Black Colour on Buttocks, Pubic Areas and Black side of my Chest. I can't use Body Talc Powder, Body Creams and Fairness Creams etc. Because I am very Sensitive to Body Talc Powder, Body Creams and Fairness Creams. I have a Combination of Skin i.e I have a Cracked Skin, Very Sensitive Skin, and Oily Skin. I can't Use ordinary soap that is available on Indian Market. My age is 27, Height is 184 cm, Weight is 70 Kg. If I use any ordinary soap, My Whole Body Become Cracked. So, Kindly Can You Please Prescribe or Suggest a Good Tablets And Soap For Removing Cracked Skin, Melasma And Dark Black Colour on My Buttocks, Pubic Areas, Back Side of Chest Permanently. Please Write Tablets And Soap Here.