Since his profile says last seen Nov 20, 2019 he might not be on here. If it's swelling it could be the battery though and with lithium batteries you don't want to take a chance. They can be a fire hazard. I know Apple stores in the USA will be opening soon but not sure where you live
Thanks for the reply. I am residing in the Philippines and all mac stores are still close so I am really worried. It has been like this for I guess two months now... i just noticed it when I heard the speakers having this loud noise when a bass-like sounds are playing. when I removed the hard case I saw that there are small openings already.