anyone of you facing problem with your phone heating so of sudden when you're playing with your phone?

Just finish downloading iOS 8.0.2 in my iphone 6. I still feel that its uses alot of ram(if you use battery doctor app you can see from there).. sometimes it reaches 80%!!. Secondly, the same heating problem like iOS 8 when you use it about 5mins(not playing games) the back of your phone will become hot. Any of you facing the same problem?

I don't know whats happening with Apple. What update did they do. still the same with the previous iOS 8.0. I think it's bcoz it is using alot of ram. if you check your ram, evertime it'll go until 80%! my goodness.

One thing about apple is the no need to upgrade like android phones etc with 2 3gb ram, quad core or what so ever but still lag. whats the point right. i hope its a bug issue that makes it like this. if not, i might want to consider migrating.