why do we have dimples when we are hungry?

The Deep Dive

Dimples are not a consequence of hunger but a fascinating anatomical variation, primarily involving the zygomaticus major muscle. This muscle typically extends from the cheekbone to the corner of the mouth, playing a key role in elevating the mouth when we smile. In individuals with dimples, this muscle often exhibits a unique structural quirk: it can be shorter than usual or, more commonly, bifurcated (split) into two distinct bundles. One bundle attaches directly to the dermis of the skin overlying the cheek, while the other connects to the corner of the mouth. When a person smiles, the muscle contracts, and the bundle anchored to the skin pulls that specific area inwards, creating the characteristic indentation. This structural anomaly is largely genetic, frequently inherited as an autosomal dominant trait, meaning only one copy of the relevant gene is sufficient for dimples to manifest. The prominence of these dimples is significantly influenced by the amount of subcutaneous fat in the cheeks. Infants and young children often display more noticeable dimples due to their naturally fuller faces. As individuals age, or experience weight loss due to factors like hunger, the reduction in facial fat can make the underlying muscular attachment more apparent. This decrease in facial volume can cause existing dimples to appear more distinct or even create temporary shadows that are mistakenly perceived as new dimples, especially when facial muscles are engaged. However, the fundamental cause of true dimples remains an inherited anatomical feature, not an acquired trait linked to nutritional status.

Why It Matters

Dimples, while purely cosmetic, hold significant cultural appeal in many societies, often associated with youthfulness and attractiveness. Understanding their genetic basis provides insights into human facial development and inherited traits, which is valuable in fields like genetic counseling and medical anthropology. For plastic surgeons, knowledge of the zygomaticus major muscle and its variations is crucial for procedures like dimpleplasty (creating dimples) or facial reconstruction, ensuring natural-looking results. Furthermore, debunking misconceptions like the hunger-dimple link promotes scientific literacy and a more accurate understanding of human anatomy and physiology, preventing unnecessary worry or misinterpretation of bodily changes.

Common Misconceptions

The primary misconception is that hunger or significant weight loss directly creates dimples. In reality, dimples are present from birth due to a genetic muscular variation. What happens when someone is hungry or loses weight is a reduction in facial fat, which can make pre-existing dimples more visible or create shadows that resemble dimples, especially during facial expressions. Another misunderstanding is that dimples are a sign of good health or a specific personality trait. They are merely an anatomical variation, akin to a detached earlobe, with no bearing on health, intelligence, or character.

Fun Facts

• Some cultures consider dimples a sign of good fortune or fertility, associating them with beauty and charm.
• Dimples are often considered a dominant genetic trait, meaning only one parent needs to carry the gene for a child to potentially inherit them.