Laughter is very important. It stimulates the production of endorphins and dopamine in the brain and reduces stress. In addition, it also stimulates the immune system. So you can laugh as much as possible. That is why it is also nice to have a nice smile that you are happy with yourself.
Some people suffer from a strong upward pulling lip that makes the gums visible. This is often also called the Gummy Smile, because the gum (“gum” in English) is visible during laughter. There can be changed by a simple injectable treatment.
With Botulinum toxin, muscles can be weakened that pull the lip too far up so that less gum becomes visible and the original thickness of the upper lip is retained during laughter. This way you get a nice smile again where the gums are not visible