Well, I know there are treatments for redness because the lovely ladies at my local salon are always talking about it. Problem is, it costs a fortune. Gin is studying: Gin doesn't have enough money to try it out, although I'd love to.
BUT you could try the following website:
http://www.gothbandphotos.com/prettygothic/lightening/
I can't speak for any of these because I haven't tried them myself. But you never know...