when a kid wets the bed

Why does it happen?
it cause by 3 things..
1- The body does not produce enough arginine vasopressin
2- under-average bladder capacity
3- it hard to wake up when his bladder is full
Treatment?
this can be stop eventually without help. but there are treatments
* training-urinating regularly and fuly empty the bladder.
* medication for reduce urine production.
- reader's digest, march 2005 -