Definitely get her evaluated by a urologist.
I went to school with a girl in the 5th grade who had no bladder control. She couldn't help it. When we were in the 6th grade, she had a surgery to correct the muscles or the tension in her urethra and it made all the difference for her.
I won't give away my age, but this was many years ago and they waited for her to be a certain age in order for her not to have to go through more than necessary. It's my guess they have made great strides in expertise in this area since then.
Get her evaluated. It may be a control issue that she simply can't help.
Best wishes.