I have just noticed it today, a patch abut the size of a 5p, maybe a bit bigger but not much. It is completely bald, relatively even. There is no clear irritation causing it. She says it hurts to touch but has not mentioned it before now. It is the opposite side to her parting and hair is usually down so not visible most of the time.
Is this alopecea? Should I be concerned? What could be causing it? Will it go away?