MBP getting very hot
I would also recommend the advice about using Activity Monitor to see what is using the processor and understand why the computer is getting hot.

A MacBook Pro is made from metal and the case conducts the heat well. It might feel hotter than it really is. 

There are a number of temperature sensors in the laptop which can easily be read by software. A search on the internet showed this application which you could use to read the sensors and may give you some idea of where the heat is coming from (although it is probably going to be either the CPU or GPU): http://www.bresink.com/osx/TemperatureMonitor.html