Often, it's a matter of not being aware of one's body signals. Young kids are still learning about how their body works. Sometimes they might be too focused on other things around them. Also, if there is a sudden change in routine, like traveling or a different schedule at a new place, it can disrupt the normal bowel movement pattern and result in an unexpected accident.
One common reason could be a sudden stomach bug or illness that causes diarrhea and makes it difficult to hold it in time. Another might be when a very young child is still learning to control their bowel movements.
One common reason is being too engaged in play. Just like I said before, when kids are having a great time, they might forget to go to the toilet until it's too late.
One common reason is being too distracted. Like when a child is really into playing a game and forgets about the need to pee until it's too late.
Often it's because kids are so involved in what they're doing, like playing or being excited, that they forget about their bodily needs. For example, when they are at a really fun party or engaged in an exciting game.
I'll tell you my story. I had eaten a whole bunch of junk food that day, like lots of candies and fried stuff. My stomach started to feel really weird but I was in the middle of playing a game with my siblings. I didn't want to stop. And then, boom! I pooped my pants. It was all because I was too focused on the game and ate way too much junk.
Well, sometimes a girl might poop in her pants because she was too engrossed in an activity. Let's say she was playing a really exciting game outside and didn't want to stop to go to the bathroom. Also, not having access to a toilet in time can be a cause. If she's in a situation where there are no toilets around, like in the middle of a long hike, she might end up having an accident.
I remember when I was in kindergarten. We were having a really important activity and I was too shy to tell the teacher I needed to go to the bathroom. Before I knew it, I had an accident in my pants. The smell was quite bad and some of the other kids noticed. I was so red - faced. The teacher was very kind though. She took me aside, helped me clean up a bit and called my parents to bring me a change of clothes.
Well, I remember when I was a little kid. I was so engrossed in playing that I ignored the urge to go to the toilet. Suddenly, it just happened. I was really embarrassed and started crying. My mom was very kind though, she just cleaned me up and told me it was okay as long as I learned to listen to my body next time.
One reason could be a medical issue. For example, some adults might have bowel incontinence due to nerve damage. This can be caused by diabetes or an injury to the spinal cord. Another reason could be extreme stress or anxiety. When a person is under a lot of stress, it can affect their body's normal functions, including bowel control. Also, certain medications might have side effects that lead to this embarrassing situation.
Maybe she was playing too hard and ignored the urge to go to the toilet for a long time. Kids often get so engrossed in their play that they forget about their bodily needs until it's too late. Also, it could be that there was some kind of problem with the toilets around her. For instance, if all the nearby public toilets were locked or out of order and she couldn't hold it any longer.