Nexus 4 issues

I've had my nexus 4 for about 4 months. In the past few weeks whenever I do very simple tasks like web browsing or playing a few casual games or watching videos on YouTube my N4 gets really really warm even to the point where it's unbearable to hold the back also battery life is much weaker then when i first bought it.

These issues are really frustrating from an otherwise great phone. Is anyone else experiencing these issues?Any suggestions or solutions would be much appreciated.