After many trips to Children's Hospital w/ one of my kiddos and tons of reading on the subject here is what we learned:
There are many factors that can cause "primary enuresis" - meaning children who have always wet the bed at night. Some of these are:
-Decreased arousal from sleep in response to a full bladder
-Small functional bladder capacity
-High nighttime urine production
-Food sensitivities
-Constipation
"Secondary enuresis" is when bedwetting starts after at least 6 months of dryness. Medical or phsychological causes are more common in children w/ secondary rather enuresis than those with primary enuresis.
Secondary enuresis can by caused by:
-Life changes ( a move, parent's divorce, a death, at the beginning of the school year, following a sibling's birth, when starting a new sport, immediately before holidays or family vacations, etc.)
-Recent illness, such as streptococcal or viral illness
-Urinary tract infections
-Eating disorders, such as anorexia
-Starting medications such as anti-depressants or allergy treatments
Sometimes you never discover the reason for secondary enuresis. But I would recommend taking him to your doctor for a urinalysis to make sure it is not a UTI. Also, pay close attention to his bowel movements and talk to your doctor if you feel he may be constipated.
If they do not find anything "wrong" medically then I HIGHLY recommend going to
www.bedwettingstore.com and looking at the following alarm kit:
http://bedwettingstore.com/kits/malem_ultimate_bedwetting_kit.htm
The bed pads are a LIFESAVER when you are exhausted from washing sheets every night. The book was great for me and I realized I had been doing a lot of things wrong (like limiting fluids at night time and waking my child up to go in the middle of the night). After just three weeks w/ the alarm (those first 3weeks were rough - I was exhausted getting up when it went off) we have now had 23 dry nights in a row!
I have the book
Seven Steps to Nighttime Dryness if there is anything you would like for me to look up for you. Sending hugs to all mommies who do laundry in the middle of the night!
