should I use tretinoin cream? or what else…. : Eczema.

Respected Beautiful Asked: should I use tretinoin cream? or what else….?

I had itching prolem on a big skin area of my body, now years have passed I don't have any problem but the skin area has become way darker than my real tone, I think I had conceiving eczema cause the skin area is really really dark. So I was wondering that should I use tretinoin(Retin-A) cream. I don't wanna go to a dermatologist as the area is a real embarrassing one.
I've heard that azelaic acid is also good for Post inflammatory hyperpismentation. So please guide me to a right treatment.