Talk to your doctor and have them investigate the situation. I'm sure nothing serious is going on.
i waz given an article frum a Friend jus recent it sayz i never thought of befor or heard anywhere else.... i will paste the werdz onto here for u to reed them....
Parents: Page: 170-173 Issue: April, 2011.
A child may have accidents if she's been chronically holding it in, says Steve J. Hodges, M.D., professor of pediatric urology at Wake Forest University Baptist Medical Center, in Winston-Salem, North Carolina. "The bladder is a muscle just like any other," he says. "If she's been doing the potty dance all day, every day, she's constantly contracting her bladder." This makes the muscle thicker and the bladder's capacity smaller. Pretty soon, it'll start contracting with less warning and more force--and your kid ends up with wet pants.
The solution is to make sure she goes to the bathroom regularly. Kids this age don't often realize they need to go until it's too late. You don't have to escort her to the bathroom every ten minutes, but be aware of the last time she went (and how much she's had to drink). As she gets older, she'll become more in touch with her body's timing.
Maybe that will help, Perhapz a class iz longer than befor, an she triez to hold it longer now, but kant make it that long, but according to doctor person, she mite cause a serious problum to develope cuz of it, an that wood be sad :(
Um, so try encouraging her to maintain a healthy use rythm, an if she kant go long enuf, get the principal or teacher to make an exception an let her leave to use a toilet, so she doenst haz to suffer.
i hope that helpz, ok. =)