Dell Inspiron 5537 - Laptop Vibrates

I bought a brand new Dell Inspiron 5537 about a month back. Lately I have started to notice vibrations around the area Below the keyboard and on the Right of the mousepad. It is noticeable from time to time and you can feel it almost like a tingling in your fingers. Not sure if it is supposed to do this. It happens quite often and not just occasionally.. Why could this be happening?