What can I use for my dark inner thighs I have lost a lot of weight but my inner thighs are not lightening up, ! please help?

Already did . Congratulations on loosing weight! the friction between the thighs is likely the cause of the hyper pigmentation. Since you lost weight the friction is reduced and the color should start lightening naturally. Make sure any treatment is adequate for you natural skin color. A common home remedy is using lemon juice (wash after application).