[Q] Arc S heating up pretty bad. topic

I recently bought an 2ndhand Arc S that is heating up pretty bad on the top front and top back part of the phone, the middle part and lower part of the phone is not heating .Even it is newly on after 2 minutes it heats up(also in idle). Also when i shutdown the phone, it's still heating and draining the battery. It will just cool down when i remove the battery on the phone. Is it grounded?? or what?? Please help me guys i love arc s :((