Phone heating up while in use.

[AC Question]

Hey, my Google Nexus 5 started heating up a few minutes into a totally normal phone call today. It was actually uncomfortable to hold to my ear. The only thing that's changed today is that I downloaded Marshmallow last night. Any ideas?

 

[B. Diddy]

Welcome to Android Central! How was the cell signal during the call? Were there any apps that started auto-updating during the call?