What's the matter with the child just urinating and then needing to urinate again?

Patient's question:

Patient Age: Three little ones
Previous Treatment and Effect: For ten days, the child always says they just urinated and then says they need to urinate again.
What kind of help is needed: What could be the reason? What might it be?

Doctor's answer:

1, Besides frequent urination, is there polydipsia? Is the total urine output high? Exclude diabetes insipidus.
2, How are symptoms like dysuria and urinary retention accompanying? Has the urine color changed? How about the presence of more bubbles? Exclude inflammation and non-inflammatory causes.
3, Compared to daytime, how has bedwetting improved when sleeping at night? If so, consider psychogenic urinary frequency.
Finally, it is recommended to first consult a pediatric department. The simplest test is a urinalysis before making further decisions.