Calculation fever: CPU can perform a large number of calculation tasks, and these calculations will heat up when they are in progress. When the workload of CPU is heavy, it needs more energy and resources to complete the task, which will lead to its fever.

The internal energy of electronic devices is converted into heat energy: between the tiny electronic components of CPU, with the transmission of current, there will also be electric energy converted into heat energy, which will make CPU heat up.

Insufficient cooling system: If your computer's cooling system is insufficient to effectively remove heat from the CPU and other components, the CPU will become hot because the heat cannot be released.

Overclocking: When you use overclocking to increase the working clock frequency of the CPU, it will make the processing speed of the CPU faster, but it will also make the CPU more prone to heat.

In a word, it is normal for computer CPU to heat up, and so is a certain degree of heating. However, excessive temperature will damage the operation of CPU, so when choosing computer hardware, we should pay attention to choosing a cooling system that can provide enough heat dissipation, use it correctly, and clean the chassis and radiator regularly.