It's normal for your phone to feel warm, or even hot, depending on how you're using it.
If your phone gets hot, it will slow charging, reduce brightness, and limit other functions until it cools down, or automatically shut off if it gets too hot.
If your phone is too hot to touch, use a different phone, tablet, or computer to contact Motorola support.
Sometimes a process can get stuck in the background. If your phone is hot but you're not using or charging it, turn your phone off and on again. This will stop the previously stuck process and resolve the issue.