Hi . Thanks for the query.
I dont think you need to be too concerned as geographical tongue does run in families and the cause is not known for sure. However, some people respond dramatically to a change in diet and multivitamin
I would advice you,for 3 months, to insist on good oral hygiene
for your daughter, brushing with creamy( not gel) toothpaste, flossing twice a day, followed by avoidance of certain allergans like nuts, fish, egg yolk, brinjal, pineapple, citrus fruits, etc. She has to take a healthy diet with lots of greens and other fruits. A daily single dose of multivitamin - multimineral tablet for 3 months.
If after 3 months, you find there is no change, do consult an oral pathologist for further evaluation.
Hope you are reassured