Here are the 10 key facts about these lower back dimples.
Number 7 reveals when you should consider seeing a doctor — it’s not always about appearance alone.
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1. Anatomical explanation
The two dimples commonly seen on the lower back are medically referred to as the “lumbar dimples” or “dimples of Venus.” These indentations are located just above the buttocks and correspond to the points where the posterior superior iliac spine (PSIS) of the pelvic bones lies closest to the skin surface. Essentially, they mark the bony landmarks of the pelvis that are visible due to a combination of bone structure and overlying soft tissue.
The dimples form because of a shallow depression in the skin caused by the underlying ligament attachments and the thin layer of fat and muscle at this site. The skin is tethered down at these points, creating a natural indentation. They are symmetrical and lie roughly on either side of the sacrum, the triangular bone at the base of the spine.
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