i just found out many scratch at the back of my ipod
done by the sillicon case wtf
anyway i just found out that my ear hole really had a fked problem
there was a piece of flesh around the ear hole at the back
and i though it would heal then i done research
and found out its call a ear blow-out
means when i was enlarging i force it too much
then it push back the flesh
then i heard u need to do operation which cost alot
hmm not i am fked up