Baking soda,honey , lemon juice paste scrub , works for any part of the body :) based on sensitivity of body part add baking soda :) u can mix sugar/ rice flour too for not so sensitive areas :) happy smooth skin
I too had the same problem. Give some time for it to heal on its own to avoid things getting worse. And switch to shaving. I use Gillette Venus razor along with Gillette satin gel. It leaves your skin silky smooth.