Laptop heat
So;
How old is your laptop?
How often do you use it? Who uses it, just you or others as well. Kids are sometimes "less than careful" with electronics.
Can you hear a fan running, even softly? Your fan may be going out or is already burned out, it happens occasionally.
Where are you placing your laptop when its on? If your leaving it on a bed or other soft (insulating) material then I'd bet its that. My brother killed his HP laptop by leaving it on his bed. Put your laptop on a hard surface, and if at all possible use a cooling stand.
What programs are you running, are they really system intensive? Do you run games, auto-cad, photo/video editing software, have you scanned your computer for viruses lately?
How many running processes are listed in task manager?
Where do you physically go with your laptop? For instance, I use mine more like a desktop, its on my desk and I almost never move it. Whereas some people carry their laptop everywhere they go. Do you use a bag to carry your laptop when on the go? Are your leaving it on if in a bag?
When was the last time you cleaned your laptop?
Are you running CD/DVD disks a lot when you see it overheat? Optical disk drives create heat, not as much heat as your seeing, but they do contribute. In conjunction with other problems they can bring heat to a problematic level.
is there direct sunlight on your laptop throughout the day. Is where you use your laptop hot, either climate or indoor temp? Do you ever keep your laptop in a hot location, like in your vehicle?
I hope you don't take any offense to any of these questions, just trying to hit all the bases.