How to fix iPhone 4 getting hot while charging and using?

My iPhone 4 gets hot while using It and charging. It's running in latest version software. It's battery life is normal but while using it I can feel hot on touch screen and near lock screen.

You're probably doing too much at once. I had the same problem, I would charge it, listen to music, and be on twitter and it was hot to the touch! My mom told me to close some stuff up and just let it charge and it cooled down.
So try that?

Hope I could help