Thank you for your query.
If your daughter is having recurrent yeast infection then she should be investigated to rule out diabetes mellitus
. I presume this has been done.
It is very difficult to let you know the cause of "blotchy" on her forehead without having a look at it. I suggest that you can wait for a day or two and in case they increase then get it reviewed by the doctor or a dermatologist
as for the cause of it. It does not appear to be related to the yeast infection.
I hope I have answered your query to your satisfaction.
Wishing your daughter an early recovery.