not switch on but getting heated

sir,

I am using this phone for last one year, its camera wont work some times with an error message , but sometime it will work. and also flashlight will be ON on some times without switch on it. these two were my problems. but today morning when i took my phone it was off and it having heat near to camera and flash light (I think flash light was working overnight ). I tried to switch on it but it is not getting ON , but it is getting heated near camera. i tried to switch on by connecting to charger also then also it is heating only not getting ON, please help me sir,......................................