Thank you for your query.
I can understand your concern. However it is very difficult for me to suggest anything for the rash
till I see it. If the rash has increased in size and is not responding to the treatment prescribed by the doctor I suggest that you discuss the issue with the doctor. The doctor will be in the best position to guide you and answer to your worries.
I hope I have responded to your query.
Wishing your daughter all the best.