E.M.
I had a c-section as well, and for a good amount of time I dealt with the red, irritated, itchy scar, it's totally normal, it's healing. I would only be worried if you saw pus. And, yes, Hydrogen Peroxide will do a pretty good job keeping the incision free from bacteria; but it might also dry it out making it itchier. So, moisturize, I used Palmer's Cocoa Butter Lotion...it is such a delicious body lotion and really helps tremendously, great moisiture, not greasy, makes the skin feel supple and smells like chocolate. I also had heat, searing pains at the sight of my incision, only relief I got was from putting a pillow on my lower abdomen and hunching over it, as to press the pillow into me. Don't stress! Enjoy you new baby!