Lordotic curves refer to the inward curve of the lumbar spine (just above the buttocks).

Too much lordotic curving is called swayback (lordosis). Lordosis tends to make the buttocks appear more prominent. Children with significant lordosis will have a significant space beneath their lower back when lying on their back on a hard surface.

If the lordotic curve is flexible (when the child bends forward the curve reverses itself), it is generally not a concern. If the curve does not move, medical evaluation and treatment are needed.