Okay, so you know how your body has a special part called the bladder that holds pee, right? Well, sometimes the bladder can get a little too excited and want to pee all the time, even when you don't really need to. This is called an overactive bladder.
It's like if you were really excited to have some cake for dessert, and kept asking for more cake even when you weren't really hungry anymore. Except instead of cake, it's pee that your bladder is excited about.
There are lots of reasons why someone might have an overactive bladder, like drinking too much caffeine or not drinking enough water, but sometimes it just happens for no obvious reason.
But the good news is there are lots of things you can do to help calm down your overactive bladder, like doing special exercises called Kegels, taking medicine that helps relax your bladder muscles, or changing some habits like drinking less caffeine. So don't worry, even if your bladder gets too excited sometimes, there are ways to help it chill out.