Anatomy
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From a medical standpoint, they are not a disease or an anomaly. They simply occur because the ligaments that connect the skin to the bone are shorter or more visible in some people.
This creates that small depression that is noticeable when the person is standing or slightly bent over; in anatomy, these are known as “lateral lumbar dimples.”
Why some women have them and others don’t
The presence of these dimples depends primarily on genetics, meaning that if one of the parents has them, their children are more likely to have them as well.
People and Society
Other factors also play a role, such as the structure of the pelvis, the natural distribution of body fat, and the tension of the ligaments in the lumbar region. They are not necessarily related to body weight.
Many thin people don’t have them, while others with more body mass may. The reason they have historically been considered attractive is because back dimples have been associated with physical aesthetics.
In classical art and Renaissance sculpture, for example, they were depicted as an anatomical detail considered harmonious and balanced.
