Hi. My 2 year old DD has very fine hair, but have noticed that on her crown it is extremely thin. Almost as though it is actually thinning and potentially getting worse. I asked the gp about it last time we were there and they said that they wouldn't worry as not all the follicles have grown yet? Does anybody have experience of this or have had a child where eventually they grown more hair? Is there anything I can be doing to make it better? I know it is superficial but I am wondering if there could be an underlying cause. She has plenty of iron.