Why Do Some People Have Dimples?
Wondering why some people have dimples? Learn the science behind dimples, their genetic roots, and why they're considered attractive across cultures.
Dimples — those small indentations that appear on the cheeks when someone smiles — are often seen as a symbol of beauty, charm, and youth. But have you ever wondered why some people have dimples while others don’t? The answer lies in our genes, muscles, and a bit of evolutionary mystery.
What Are Dimples?
Dimples are small indentations in the skin, most commonly found on the cheeks, although some people have them on their chins. They become more noticeable when a person smiles, as the underlying muscles contract and pull the skin inward.
Cheek dimples are the most common type and usually appear on both sides of the face. Chin dimples — sometimes called cleft chins — form differently and involve the shape of the jawbone.
The Science Behind Dimples
1. Facial Muscle Variation
The main cause of cheek dimples is a variation in a facial muscle called the zygomaticus major. This muscle helps raise the corners of your mouth when you smile. In people with dimples, the muscle may be split into two bundles. One bundle connects to the corner of the mouth, while the other connects to the skin. When the muscle contracts, it pulls the skin inward, creating a dimple.
This muscle variation is a natural anatomical difference — not a deformity, but rather a unique trait.
2. Genetics
Dimples are often considered a dominant genetic trait, meaning that if one parent has dimples, there’s a good chance their child will too. However, it’s not that simple. Some children of dimpled parents don’t have dimples, and vice versa. This suggests that dimple inheritance may involve multiple genes or factors beyond just dominant-recessive patterns.
In short, while dimples can run in families, they are not guaranteed to appear in every generation.
Are Dimples a Birth Defect?
Not exactly. While some scientists have historically classified them as a minor congenital anomaly (a harmless variation in development), dimples are not harmful and don’t affect your health in any way. Many people consider them a desirable feature.
Why Are Dimples Seen as Attractive?
Throughout history and across cultures, dimples have often been associated with youthfulness, friendliness, and beauty. This may be because they are commonly seen in children and sometimes become less noticeable with age as facial fat shifts and muscles change.
In some cultures, dimples are believed to bring good luck or enhance one’s smile — making them even more desirable.
Can You Develop or Lose Dimples?
Dimples are usually present from birth, but they can become more or less visible over time. Weight gain, aging, or changes in muscle tone can make dimples appear fainter or disappear altogether.
Interestingly, some people choose to get dimple surgery (called dimpleplasty) to create the appearance of dimples, especially in countries where they are considered an attractive trait.
Dimples are a small but fascinating example of how our genes and anatomy influence our appearance. Whether you're born with them or admire them in others, dimples are a delightful feature that reflects the diversity and uniqueness of the human face.
So next time you see someone flash a dimpled smile, you’ll know it’s more than just a cute quirk — it’s a glimpse into the intricate science of human biology.
