Many factors will cause the heating up of the Xiaomi Gaming Mouse Lite, such as the issue with the power supply or the USB port, excessive uses caused by energy-extensive games and the using environments.
The rear RGB colorful ambient light will not make you feel any heat during daily use. However, during intense games, the body temperature will rise slightly, and the palms will secrete more sweat than usual. All these factors combined will cause a slight feeling of heat, however, it does not affect normal use. It is recommended that you stop using the mouse and check for visible damage to release the temperature rise of the mouse.