I am 19, and I have the feeling of not emptying my bladder f

I am 19, and I have the feeling of not emptying my bladder fully. I also leak urine, and have trouble getting to the bathroom in time. Sometimes, I have a burning sensation. I also get up at night to urinate. What could be causing this?

You are very young to have these symptoms. You could have either a urianry tract infection or overactive bladder. You need to see your gynecologist.