at what age swhould i get concerned with night time bed wetting

Most doctors aren't concerned with bedwetting until the age of six. After that, it is very important to have a child get regular checkups with their pediatrician. Even if at first it isn't diagnosed as a medical condition. Continuing to follow up and monitor with a doctor's supervision will give a child the best chance at eventually lessening their wetting issues. Still, please know that this may go on well into the teenage years if it turns out that the bladder isn't growing as fast as the rest of the body. So it may just take some time and patience with guidance from a doctor.