Why is my iPod not turning on?

hello, today i got back from school and my iPod was very hot. i unplug it and give it some time to cool down and after an hour it was all cooled. i noticed that the iPod was not turning on so i go to plug it in and i thought i heard a “skreeeeeeeee” like a high pitch noise coming from the iPod. i put my ear close and it was coming from the top left corner and the iPod started to get hotter. so i cant get it to turn on and every time it plugs in it makes a high pitch squeal. please if you know what is wrong or know what i need to do to fix it please respond with an answer. Thank you.