Mac Uncontrollable Clicking

hi. macbook clicking on everything. try go click on something, words on screen become highlighted in blue. also, while typing find become highlighted in blue next letter click loose typing. problem used happen @ starting after restarted computer minute, non-stop. also, feel thing click on click down far won't come up. how should fix problem?

 

a similar thing happened friend of mine. had unibody macbook user removable battery expanded , pressed against bottom of trackpad making clicking impossible or unstoppable constant click.

 

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