I have a 2 year old granddaughter .. other than
Not a cause for concern.
Thanks for using the Ask a Doctor service.
I have gone carefully through your query. I do not think that it is something concerning. However, you can feel free to give Biotin 10 mg supplement once daily. The thinning could be due to biotin deficiency and this could help. Also make sure to apply some antifungal shampoo like Nizoral twice a week and if the hair thinning is due to a fungal infection that should get resolved as well.
Feel free to write back.