Thank you for your query.
I can understand your concern.
The child might have urinary tract infection
.The symptoms are all related to this condition.
If the child was on diapers there is an increased chance of having urinary tract infection.
Do a urine test after consulting your doctor and give him plenty of fluids.
Consult your doctor if the problem persists.
If you have any further queries you are free to consult me.
Hope this answers your query.
Wishing a speedy recovery.
Have a nice day.