Go to your local doctor and ask for a certen tablet called Minirin its the tablet i take for the porblem he has but i take it before i go to bed. and im 12 years old btw
Before anything else, he should be cleared medically. The vast majority of children who are enuretic do not present with any medical abnormality, but this should never be taken for granted. If he is cleared medically, then a behavior modification program should be undertaken, focusing on a reward system. You can confer with a behavior specialist to design this.