I have a 30 yr. old raised keloid scar as a result from chicken pox as a kid. i used scarguard to flatten it. what do i use to lighten it? benzoyl p?

MD Skin programs: Dr. Obagi is justly famous for being the first doctor to develop a prescribed skin care program that evens pigmentation problems, improves scarring, & even reverses fine lines. It actually delays skin aging. It's still a great skin care program & the cost ends up being about the same as all the over-the-counter anti-aging skin products out there, but with much better results. Others help, too.