How to show your gums when smiling?

Under normal circumstances, it is normal for the gums of the upper teeth to be exposed by 0-2mm when laughing, but more when laughing, the teeth are uneven, the teeth are protruding (buckteeth), and the lips can't close the gums and teeth. This situation needs to be corrected, which will generally have a good effect. The gums are too thick and cover most of the crowns. This depends on whether it is congenital or acquired gingival hyperplasia, and it can be corrected by gums.