Question on Skin whitening and even complexion.

I am 26 years old Indian. You once told that the inner part of your upper arm is the natural skin color (please see the link: https://www.realself.com/question/miami-fl-skin-creams-my-skin-lighter-shades-permanently). I used to be really fair until 4-5 years old but with time and health issues my skin has become dark but he inner part of my upper arm is still quite fair, now my question to you is that can I permanently make the rest of the skin light and fair like the inner part of my upper arm?

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