You have not mentioned how frequently she vomits, how frequently the episodes recur, is she totally symptom free in between.
is a diagnosed after all other causes are ruled out and in between the episodes she will be perfectly fine. Some kids have migraine
head aches associated with vomiting.
All metabolic causes, GI causes etc should be ruled out.
I wish to know how is her growth- weight and height?
I also wish to know if her developmental mile stones were okay?
All kids if over fed- are likely to vomit.
If she gags often- her throat should be checked.
Young kids with UTI can present with poor appetite
and vomiting. The cause of her recurrent UTI too should be looked into.
A trial of antacids/ medications like Lansoprazole
should be given if gastritis
or reflux is suspected.
Its better to get a detailed evaluation based on history, examination, needed investigations and consultations.
Zofran (Ondensetron) can be given to control vomiting.
Hope my answer helps you.
Wish your daughter good health.