Grazes are the worst.
It's a bit of skin like a flap over a bit of raw fresh skin.
My graze took a good week to heal with Cameron.
My tips-
1. Drink LOADS of water, the weaker your pee the better.
2. Stuff water jugs, use the shower head on your bits, heck pee in the shower. That helped me.
3. Change your pad regularly.
I'm healing at the front now, it's making me itch more than anything. I use an ice pack wrapped in something, to soothe the itch. It works.