If it's especially hot, as in uncomfortable or even painful to touch, then you should take it back to wherever you purchased it from, or your local Apple Shop or w/e.
Show them how hot it gets and ask them what they can do about it. Whether it's a repair or replacement.
I know they can get very hot, and my old iPod Touch used to get really hot too when it was doing too much.
One thing you can do to mitigate the awkwardness of using it, would be to get yourself a nice case for it, but not one of those skin-tight ones. They can give you somewhere that's cool enough to hold it.