What's the best treatement for skin lightening?

Glutathione is not used in the US. Skin lightening creams are recommended to help lighten skin discoloration rather than to lighten the skin tone. 

The cause of these straie are unknown as it relates to your skin lightening agents.  There is a possibility that the skin creams contained steroids.  It is best to discontinue their use and begin a regimen to rebuild collagen that has been lost. An experienced dermatologist should...

Abnormal pigmentation can be improved with Melarase AM and Melarase PM creams. If the pigmentation is due to a birthmark, the lightening may take longer to accomplish. Raffy Karamanoukian MD FACS

Melasma and hypermelanosis are common. In our office, we recommend Melarase AM and Melarase PM to lighten abnormal pigmentation of the skin. Raffy Karamanoukian MD FACS

I'm sorry to hear about your experience. Treating a chemical burn from facial bleaching requires careful attention to promote healing and prevent further irritation. Here are some steps you can take: Immediate Care: Rinse Thoroughly: As soon as you notice a burn, rinse your face with cool water...

Labial discoloration can be improved with topical creams, including Melarase AM and Melarase PM used twice daily on the affected areas. Raffy Karamanoukian MD FACS