Thank you for your query.
By the description provided by you it appears that your daughter is getting the appropriate management. However I would suggest that you discuss with the doctor to rule out any renal calculus which may be giving rise to the pain. As you have mentioned that there is residual urine I believe an ultrasound
must have been done and may be repeated. If the ultrasound is normal then an X-ray KUB region and/or an intravenous pyelogram
may be done to know the status of the urinary tract
. The aim should be to control the urinary infection and prevent its recurrence.
I hope I have answered your query to your satisfaction.
Wishing your daughter an early recovery.