My forehead has gone very black. Is there a treatment or cream to lighten it?

Melarase seems to work very well for skin discoloration and skin pigmentation associated with PIH and melasma. In our office, we recommend twice daily application of the products. Raffy Karamanoukian MD FACS

In the US/ UK although available there have been concerns about its safety and I would not recommend IV glutathione.  There are creams that we can give you that will brighten the skin in a far safer way. 

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...