How to prevent iPhone 12 Pro from overheating? My iPhone 12 Pro (Max) gets extremely hot (to the point the screen dims, and beyond) with regularity, usually several times per day with just regular use of fairly basic apps.
Others have reported the problem as well:

Is there anything that can be done to alleviate this?
If you have a cover or case for your phone, you should try removing them as they tend to hold in the heat. Keep you phone out of the sun and use it in a cool area. You can also turn your screen brightness down some and kill background apps you are not using. If that doesn't help turn off Location Sevices on your phone. Do this by going to settings-privacy-location services off.
These and other options are described here and here.