Dimples in general are thought to be genetic, but there's no concrete evidence for this. There has been little research done on this topic, so scientists are not sure what genes may be linked to dimples. However, what evidence there is suggests that dimples may be a dominant genetic trait.

Are back dimples rare?

Lower back dimples are present on either side of the spine, over the lower back. Around 20-30% of the world's population has dimples, which makes them quite rare. In many cultures, dimples are a sign of beauty, youth, and luck. Many men and women desire dimples on their faces.

What causes back dimples?

Back dimples are the set of dimples that are on your lower back. Back dimples are the result of ligaments, tissues that connect your skin to your pelvis. If you had back dimples, you would have one on each side of your spine. In contrast, there would be only one sacral dimple.