Micromax Sliver 5 Over Heating Issue

My Micromax sliver 5 mobile is constantly over heating! While I do agree that overheating is nothing new and happens to many of android devices but this phone is heating up like anything o_O I'm a moderate user I just use whatsapp & facebook on my phone. I don't even have a single game in my mobile. Still it is heating up even while on a call only for 5 minutes :oops: Is there anything I can do to prevent this?