Are there Any Treatments for Nipple Lightening?

While oral glutathione pill can be helpful for skin lightening, there is significant risk to one's kidney function at higher dose. I would stay away for now until the drug is better studied and approved by the U.S. FDA.

Dark spot correction can be attained with use of the Melarase creams, Melapads, and once monthly Melapeels.  The creams may work well for dark skin types, including Indian or Pakistani.  Raffy Karamanoukian MD FACSLos Angeles

I see this condition very often and begin patients on MelaPads in the morning and Melarase PM in the evening to reduce pigmentation and dark spots. 

This post-laser hyperpigmentation is common and can be addressed effectively with Melaquin AM and Melaquin PM treatment protocols to improve post Fraxel hyperpigmentation. 

Begin with Melapads and Melarase PM for light pigmentation. If the pigmentation is severe in the armpits, opt for the Body Brightening kit followed by Clear and Brilliant lasers. Best, Dr. KaramanoukianLos Angeles

Lighten dark skin areas under the thighs with a topical skin lightener such as Melaquin twice daily. Raffy Karamanoukian MD FACSLos Angeles