DIAGNOSIS Some warmth is normal, but getting "really hot" in that specific spot usually points to the motor or the electronic components in the handle working harder than they should, often due to excessive load or a poor internal connection.
FIX First, check your technique. Are you pushing too hard, using a dull bit, or driving very large screws? That makes the motor work overtime and generates heat. Let the drill do the work. Second, make sure you're using the correct speed setting ("1" for high torque, "2" for high speed drilling) for the job.
IF THAT DIDN'T WORK If it overheats even with light, proper use, there could be a problem like worn motor brushes causing arcing and extra heat, or a failing bearing creating drag. This is a sign the drill might need professional service soon.
HEADS UP Heat is the enemy of electronics. If it's too hot to hold comfortably, stop using it and let it cool down completely. Continuous overheating will shorten the life of the motor and the internal circuit board. Always use a fully charged battery, as a weak battery can also cause the motor to overwork.