Vacuum assisted birth scalp injury

Lindsay
During my delivery they used the vacuum to help get my daughter out. Long story short it caused a huge bruise and a giant thick scab on her head. We're 7 days postpartum and it's dried up and not weeping or anything, I noticed a little blood in her bassinet where a little bit of scab rubbed off. I was just wondering if anyone knows how long it will take for this scab to go away?