hi.i have read everything available on this topic here. i have tried to find on net 4 a long time also. but i read that the reason of dark skin is insulin resistant body.n i also know its common but i feel shame 4 this.maintaing proper hygene is nt working.no foul smell no itching.but it effects marital life also.u cant participate actively being always conscious.it also meanz alot who is suffering 4rom this prob.kindly tell me what is insulin resistance.i know i m actually suffering 4rm this prob bc my doctor prescribed glucophage 4 a year. i m not at all dibetic.n plz dnt say it does nt effect marital life.it does.