Z3C getting hot while normal usage

[Leonardo_Burro]

 I have the latest Android update and my z3c gets hot after a few moments while i'm reading online, usin Facebook or whatching videos on YouTube (i'm not stressing the Phone at all).

It gets hot in the back where is the Sony logo and in the front at the same height.

Ps: it gets very very hot while charging so I think it's a battery problem.

Any suggestion? 

[Harpoman61]

i have the Z3 compact.  I have notice lately that it is getting unusually hot. I was using the video camera and it said shut down now before it closes itself. Also when I look at my pictures or play music..