Chosen Solution
My Macbook Pro has the trackpad bulging out and i googled to see if i could find out the problem. lots of people said its the battery thats bad, but i was wondering if i also need to replace the trackpad or if it would still be good to use with just replacing the new battery?
If the trackpad has not cracked it is most likely still good. But get that battery out before it does more damage. MacBook Pro 13" Unibody Mid 2010 Battery Replacement
I’ve experienced this, and when the battery bulges like this, the trackpad will get bent, and would need to be replaced, because the trackpad internals got damaged by the bending.