Would you be concerned if you have noticed in the past approx 6-12 months an increase in the frequency at which your 6yr old goes to the toilet?

DD1 has always had extremely strong bladder and bowel control - as a toddler there was no such thing as an "Accident", she always managed to hold on. But in the past 6-12 months we have noticed that she is going to the toilet to do wees more often. Sometimes as often as 3-4 times in a couple of hours. She says that she doesnt have any stinging but she just needs to go alot. My mum thinks that she shouldnt be going as often as she does and that it is an issue.

What does everyone else think? Would you be concerned and get it checked up?