What's wrong with my skin?

For a while now I've noticed that my cuts take FOREVER to heal, and they're normal cuts that take my other family members a week to be completely healed up and gone. Most of the time they leave scars but sometimes they fade away. A month ago I fell while running on the treadmill and got burn marks on both of my calves. They're still noticeable marks and it's driving me CRAZY! I want them to be gone, In the past week neosporin, lotions, and cocoa er with vitamin e lotion. And it helps for a few minutes but then it comes back just the same as it always looked. What's wrong with me???? My mom says it's cause I'm pale but I know people who are paler than me and they don't have this problem. I went to the doctor and got a blood test but they basically had no explanation which I think was total bull.