Temperature problem

Hello guys and girls, i have problem with my CPU, my model is AMD Athlon x4 740 3,2GHz and his temp. is getting bigger and bigger, max temp. 80+ i do not know what is the problem. Please help

Celsius I believe right? Otherwise, no need to worry.
How are you cooling it?
2 easy steps to check through:
1. Make sure your cooler is plugged in properly/running correctly. If it's watercooled, is your pump still running? Does it feel really hot at the base of the tubing? If it's air cooled, are the fans covered in dust/ not running as fast as usual? Did the cooling block come off the processor somehow?
2. When was the last time you applied thermal paste? Seeing as your processor came out in October of 2012, and guessing that you didn't buy it immediately, this could be an issue if you haven't reapplied thermal paste in over three years you may need to replace it, especially if you've removed/replaced the heat sink a few times, or even if you only removed it once or twice.
3. Have you recently changed anything in your computer? This is software or hardware. If you installed anything recently, see how much load you are under at idle, something might be pushing it more than usual. It's also possible to have accidentally installed malicious software (obviously accidentally, unless you do that stuff for fun, but w/e your life) that is just screwing with your computer. Unlikely but still a real possibility. And if you changed hardware, check connections for any fans/coolers you might have bumped into, or see above two points.
That's all the general help I can say w/o knowing more specifics, and with my limited crude knowledge.