egafd.com

You should be able to work out where the air intake and exhaust are.
Easier said than done I know but try aiming a hairdryer set to cold blow at the intake.

Does the base or case in general feel hotter than usual?

I'd settle for a couple of paracetomols, chum.

If overheating is the problem, try thecoolingshop.com for laptop coolers