Part of my MacBook Pro is swollen, it doesn't affect the function or keyboard, it's NOT a battery isuue (battery swollen), it used to be flat, thanks guys for your help :
How Your Macbook Battery May Be Affecting Your Trackpad - TechVise
MacBook Air battery exploding/expanding - Apple Community
PSA: Macbook batteries are exploding. Apple has issued a recall, go here to see if yours is affected. : r/technology