I have a brown area on my chest, where my shirt buttons up to, that is darker than the rest of my skin.   It looks like it is either dirty, which it is not or tanned just in that area.  I have tried everything I can think of to get this area to look like the rest of my skin.  nothing seems to work.  Any suggestions?  I am going on a cruise in November & would love to wear a lownecked dress, but I don’t like the way it looks.  Help!!!