M.L.
Do you notice on days of the iv's it is worse? That often causes constant urination.
Diabetes, Pollakiuria, vulvovaginitis (usually with burning), over active bladder, are a few causes of frequent urination. It would be helpful to know if she as maybe having pain or itching as well. Talk to your Dr when you go in and see if you can find out if there are any other related symptoms.
Pollakiuria:
Also called frequent daytime urination syndrome, this is a common, although not very well known cause of frequent urination in young children. Most common between the ages of 4 and 6 years, these children begin urinating small amounts of urine about 10 to 30 times each day. They may also wake up at night to urinate, although not as often, and they should have no other symptoms and a normal urinalysis. Although sometimes related to stress, no specific trigger is found for many children with pollakiuria and it often goes away in a few weeks or months without any treatment.