How do you know if your baby boy has a UTI ??

For some reason my baby has been screaming all day every day. I am never able to find a cause, rarely ever gas and not because he’s hungry because he nurses 24/7. And I’ve noticed it’s normally when he wets his diaper ? I could be wrong but ?? It feel like it’s pointing to a uti ?

How do you know if your baby BOY has a UTI??

He’s 2 months old and has aton of pee diapers everyday