From a scientific perspective, dimples are actually caused by a slight variation in the structure of facial muscles. Specifically, they are linked to the zygomaticus major muscle, the muscle responsible for lifting the corners of the mouth when you smile.
In people with dimples, this muscle may be split into two sections instead of one continuous muscle. This creates a small tether in the skin, which pulls inward when the muscle contracts during a smile. The result is the small, charming indentation we call a dimple.
The Role of Genetics
One of the main reasons some people have dimples while others don’t is genetics. Traits like eye color, hair texture, and certain facial features are often inherited from parents, and dimples can be part of that genetic inheritance.
If one or both parents have dimples, there is a higher chance that their children might have them as well. However, genetics can be complex, and inheritance is not always perfectly predictable. Some people develop dimples even if neither parent has them, while others may not inherit them despite a strong family history.
Scientists generally consider dimples a dominant genetic trait, meaning it only takes one copy of the gene from a parent for the feature to appear. Still, human genetics is rarely that simple, and multiple genes may play a role in determining whether dimples appear.
