Those small, symmetrical indentations just above the buttocks—often poetically called "dimples of Venus"—are more than a charming physical trait. While frequently admired for their aesthetic appeal, they also hold anatomical significance and, in rare instances, may warrant medical attention. Understanding the distinction between a normal variation and a potential concern can bring both clarity and peace of mind.
What They Are: A Natural Anatomical Landmark
Medically referred to as sacral dimples or posterior superior iliac spine (PSIS) landmarks, these indentations appear over the bony prominences at the base of the spine where key ligaments attach. They form when shorter ligaments or localized fat distribution create a subtle depression in the skin's surface.
These dimples are often more visible in individuals with lower body fat or specific genetic traits, and they typically appear symmetrically on both sides of the lower back. Named after the Roman goddess Venus, they have been celebrated in art and sculpture for centuries as a subtle emblem of beauty, grace, and human form.
When They Are Entirely Normal (The Vast Majority of Cases)
For most people, these dimples are a harmless anatomical variation—simply part of the body's natural landscape. Characteristics of benign sacral dimples include:
Appearance during adolescence as the pelvis matures and body composition shifts
No associated pain, tenderness, or discomfort
Symmetrical, shallow indentations with smooth, unremarkable skin
Absence of accompanying features such as unusual hair growth, discoloration, swelling, or skin tags
When these criteria are met, no evaluation or intervention is necessary. They are simply a quiet signature of your unique structure.
When to Pay Attention (Rare but Important Considerations)
While sacral dimples in adults are almost always benign, in infants a single, deep, or off-center dimple can occasionally signal an underlying spinal condition. These may include:
Spina bifida occulta: A mild, often asymptomatic form of spinal development variation
Tethered cord syndrome: A condition where the spinal cord is abnormally attached, potentially affecting nerve function
Dermal sinus tracts: Rare abnormal channels connecting the skin surface to deeper tissues
In infants, certain features warrant medical evaluation:
A dimple larger than 5 millimeters in diameter
Location above the natural crease of the buttocks
Presence of associated findings such as a tuft of hair, skin discoloration, swelling, or a small skin tag
It is important to emphasize: in adolescents and adults, sacral dimples that have been present since childhood and remain unchanged are overwhelmingly benign. New, painful, or asymmetrical changes in adulthood should be discussed with a healthcare provider, but longstanding, stable dimples are almost certainly a normal anatomical feature.
A Gentle Perspective
"Your body's marks aren't flaws—they're maps of your uniqueness."
Unless you are noticing new changes, persistent pain, or neurological symptoms such as leg weakness, numbness, or changes in bladder or bowel function, those dimples are simply a quiet testament to your individual anatomy—nothing to correct, only to understand and accept.
If uncertainty ever arises, a brief consultation with a physician can provide reassurance. But for most people, these subtle indentations are exactly what tradition has long suggested: a small, natural gift, quietly elegant and entirely harmless.