Some people have smile lines or dimples, while others don’t—and it often comes down to genetics, facial structure, and lifestyle.
Smile lines, also called nasolabial folds, are creases that run from the nose to the mouth. They typically become deeper with age as skin loses elasticity. In contrast, dimples are caused by a variation in facial muscles and are often inherited. They appear when smiling and are generally seen as a natural and attractive feature.
Dimples result from a split in the zygomaticus major muscle, which pulls the skin inward, creating the dimple effect. Smile lines, however, can be deepened by sun exposure, smoking, or frequent facial expressions over time. People with fuller cheeks or prominent facial features may naturally have more visible smile lines. Though sometimes associated with aging, smile lines also reflect a joyful life full of laughter and expression.
