Some people have dimples or smile lines, while others don’t, largely because of genetics, facial structure, and lifestyle. As the article explains, “Smile lines, also known as nasolabial folds, are creases running from the nose to the mouth.” They often deepen with age as skin loses elasticity, but they can also appear earlier depending on facial shape and daily habits.

Dimples, by contrast, are usually inherited. “Dimples occur when the zygomaticus major muscle splits, pulling the skin inward to create a small indentation.” Because this muscle variation is genetic, dimples often run in families and remain visible throughout life.

Smile lines can become more noticeable due to sun exposure, smoking, or repeated facial expressions like laughing and smiling. People with fuller cheeks or more defined bone structure may naturally show deeper lines, even when they are young.

While smile lines are commonly linked to aging, they are also seen as positive features. They reflect frequent laughter and emotional expression, suggesting a life filled with connection and joy rather than something to hide.

Across many cultures, dimples are viewed as signs of beauty or good fortune, while smile lines are considered marks of warmth, character, and happiness. Together, these facial features tell a personal story shaped by genetics, expression, and time—visible reminders of individuality and lived experience.