Some people have smile lines or dimples, while others don’t—and this often comes down to genetics, facial structure, and lifestyle. Smile lines, also known as nasolabial folds, are creases running from the nose to the mouth. They deepen with age as skin loses elasticity, while dimples are formed by variations in facial muscles and are typically inherited.

Dimples occur when the zygomaticus major muscle splits, pulling the skin inward to create a small indentation. Smile lines, on the other hand, can become more visible due to sun exposure, smoking, or repetitive facial expressions. People with fuller cheeks or defined features may naturally show deeper lines.

While smile lines can be linked to aging, they’re also a sign of a joyful life filled with laughter. Dimples and laugh lines alike reflect emotion, warmth, and connection—visible reminders of a life well-lived.

In many cultures, dimples are considered symbols of beauty or good luck. Similarly, smile lines are often seen as marks of character and happiness. Both features tell a personal story shaped by genetics, expression, and time.