Would you consider this normal or not for a six year old little girl?

My neighbors granddaughter that I babysit occasionally sometimes has bruises and/or scabs on her inner thighs up high near her "privates". She also tends to "please herself" down there by touching and rubbing it. I am very concerned about this and have mixed answers as to if it's normal for someone of such a young age to be doing that. I have questioned her about if anyone was touching her or hurting her, letting her know that it was okay to tell me and we'd make it stop, but she says no one does. What do you think??