My iphone 4s got really hot?

Last night my actual phone and not just the charger got really hot to the touch. I've only had it for about a month and thats the first time its done it. I just turned it off and turned it back on in the morning and it was fine but it freaked me out. What's wrong with it?

Iphones are *** lol. To be short, its a computer device and it will run hot when its processor is going flat out or when it is running through AC power. It will get hot occasionally. Turning it off is a good idea time to time anyway. If you feel it getting too hot, turn off background programs like bluetooth or Wi-Fi or gps settings. Alternatively, it may be faulty if it is so hot it burns you lol. So you could take it back

Oo well baby i was on
dat ting
last nite
so now its so hot
DROP IT LIKE ITS HOT!

You probably charged it too much or somethin but i think it's better that you don't think about it until it happens again

When the phone is fully charged, unplug it. Also just like was previously mentioned, try to make sure no background programs are running. Also if the phone is laying on your bed or somewhere it can't "breath" it will get pretty hot.especially if you have any type of aftermarket case on it.