It says the system is hot and turn off

Everytime i turn it on black ops 2 or gta v or any game with violence it turns off after it says the system is hot and i had let it sit off for a few days and hours it has been happening for years how to fix??

My psn is Tjkiller1705 add me abd subscribe on YouTube at blacksavage143 and Gold Dream Studios to enter the gta v modded acc give away and the sharkcard giveaway