getting hot

[barış]

My phone out of nowhere gets very very hot and battery drains unbelievably fast. What can be cause of that?

[Phy]

Have you recently updated or installed a new OS?  Or are you playing games, constantly online, or charging the phone, when the heating and battery drain occur? 

[barış]

After lollipop update this happens. I don't even use phone. Just now I left phone went somewhere like 20 minutes it was on standby And battery 30 percent. When I touch the phone it was burning and the battery was 11 percent.

[Phy]

That is normal. I do believe the phone battery will drain faster in the beginning after updating to lollipop. Take a look at the link below

FAQ on Facing Problems with Abnormal Battery.
http://talk.sonymobile.com/t5/FAQ/Facing-problems-with-abnormal-battery-and-shutdown/m-p/320375#U320...

[Phy]

Also, it has be mentioned that reinstalling the update with Sony PC Companion solves those issues. You can try that.

Sony PC Companion.
http://support.sonymobile.com/us/tools/pc-companion/