samsung s4 active gets warmer than it used to. It has discoloration on the screen.

[AC Question]

Tried rebooting in safe mode,and cleared cache, but still no help. should I try factory reset?

 

[B. Diddy]

Welcome to Android Central! The screen discoloration is likely a faulty screen. The warmth could be due to a number of issues--the first thing I'd try is a new battery, since a failing battery can heat up.