Preventive measures for nocturnal enuresis (bedwetting) in children may include:

1. Fluid management: Encourage adequate fluid intake during the day but limit it closer to bedtime. No water after 7pm or 8 pm.
2. Toilet routine: Establish a consistent bedtime toilet routine to empty the bladder before sleep.
3. Bedtime routine: Ensure a calm and comfortable bedtime environment to reduce anxiety.
4. Avoiding irritants: Limit caffeinated and sugary drinks, which can irritate the bladder.
5. Scheduled voiding: Encourage regular bathroom breaks during the day to prevent a full bladder at night.
6. Night lights: Install a night light to help the child navigate to the bathroom if needed.
7. Positive reinforcement: Use positive reinforcement and rewards for dry nights.
8. Bedwetting alarms: Consider using a bedwetting alarm to help the child wake up when they start to wet the bed. This is not available easily. However, parents can put an alarm and wake up during the usual time of bed wetting and encourage child to empty bladder. This process can be done for atleast 2 to 3 weeks to ensure child’s routine is maintained and bet wetting episodes subside.

It’s essential to consult your pediatrician for personalized advice based on the child’s specific situation.