My dd is 20 months old and has very fine blonde hair. When she was born she appeared bald, and when it started to grow, she had a large bald patch on the back of her head, I presumed due to the fact that she was sleeping on her back. Now she's older and sleeps mostly on her side, but it's still there . There hair around the bald patch has grown and if carefully arranged can cover it up, but if it is parted, it is clearly visible. There are one or two hairs growing in the middle of it,but otherwise, it's completely bald. Has anyone else had this and can reassure me that it will grow back in?