If it is prominent, you can go to orthodontics and tidy your teeth. It's not too late to be 20, but it takes longer than children need. It is estimated that it will take 1 to 2 years. What needs to be psychologically prepared is that ordinary braces for orthodontics will look ugly, and many people can't stick to it because of this. If you use expensive braces, it may not be so obvious. You can ask your local doctor for details.