MacBook pro keyboard gets hot

If you dig down through the links in About fans and fan noise in your Apple product - Apple Support, you will eventually find this passage from Keep your Mac laptop within acceptable operating temperatures - Apple Support:

"If your Mac laptop gets warm even when it isn’t doing tasks that require intensive calculations, or if it has fans that run for a long time, use Activity Monitor to check CPU activity. Look for malfunctioning processes that can put a significant load on the CPU and check for unexpected fan use. If issues persist, close and open the lid on your laptop, or restart your computer. ..."

Post a screenshot of Activity Monitor if you wish. Use the Energy pane, or CPU sorted by %CPU to see which apps or processes are using the most energy or placing the greatest demands on your Mac's CPU, respectively. To show the most relevant information I suggest selecting "Active Processes" from Activity Monitor's View menu.

Y2kboy43 wrote:

The fan runs more often than usual and the keyboard becomes hot to touch.

Check the cycle count, and check for any related diagnostic reports:

Determine battery cycle count for Mac laptops - Apple Support

Then check with Apple Support.

Some warmth is entirely expected, as the battery and the memory and he storage and the processor all get warm.

Hot is not expected, however, and might mean a run-away app or other software issue exist, or can mean a there is a hardware problem.

Please see: Writing an effective Apple Support Communities question - Apple Community

So that we can help you best, please tell us which Mac, model and year you’re having trouble with, and what macOS version you’re running. Find that info by clicking the Apple menu () at the top-left of your screen and then select About This Mac. (Note- for privacy and security reasons, please never post your serial number.)

What have you done to troubleshoot the problem?