Is it recommended to take it to see someone? Or try opening the back and checking for dirt?
Is your warranty valid? If yes, don’t disassemble the notebook!
This would cancel your warranty and additionally you run the risk of hardware damage!
If you think, that your cooling fans are clogged and dirty due to the dust, you try to clean the fans and grilles using an compressed air spray…
This helps to get rid of dust… so if dust is a problem here, this workaround should help to fix the issue…