The baby is only two months old. I've noticed that she often scratches…

The baby is only two months old. I've noticed that she often scratches her face, eyes, nose, cheeks. She sometimes touches herself in the hair and pulls straight. I don't understand why she does this and is it normal? Maybe she's nervous or there could be other reasons! We can't avoid scratches without them. And sometimes she hits me with her hands like she's hitting me.