Chosen Solution

I was working on my macbook and suddenly I heard a pop. When I looked at my macbook, i saw that at the side, the bottom panel was bulging out. The screw are still holding it together though. See the image below. I tried pushing it back but it just popped out again after a couple of minutes.

So I’ve got a couple of questions What are possible causes for this?Can I continue using the macbook untill it’s fixed? If there’s more information needed, let me know.

Replace your swollen battery ASAP, here’s how: MacBook Pro 15" Touch Bar Late 2016 Battery Replacement

Do not try pushing it back in! It is very likely one of the embedded battery cells has expanded. Discontinue using the machine and get the battery removed at a repair facility as soon as possible (an expanding battery poses a serious danger - it can damage the computer, release chemicals into the air, or cause a thermal event to occur).