Sacralization is a condition where the last lumbar vertebra (L5) fuses or joins with the sacrum, which is the triangular bone at the base of the spine. This can occur naturally or as a result of a congenital abnormality. Sacralization may cause back pain, limited spinal flexibility, or nerve compression leading to leg discomfort. Treatment for sacralization is typically conservative and includes pain management, physical therapy, and activity modification. In some cases, surgery may be considered to relieve symptoms or correct severe spinal deformity. Consulting with a healthcare professional is important for proper diagnosis and individualized treatment.