It is not extremely common but some PALS do experience greater urgency. Does he go a lot each time or just a bit? Does he feel as if he is retaining urine when he does go? Does he have liquids just before bed? Varying diet/fluid schedules is a first move to try; if that fails, his doc can write a prescription that may help.
Feel free to start a new thread in the CALS section to introduce yourself.
Best,
Laurie