Hello! Spondylolisthesis is a condition in which one of the vertebrae in the spine slips out of place onto the vertebra below it. It is most common in the lower back, but can occur anywhere along the spine. It is usually caused by a combination of factors, such as age-related wear and tear, injury, or overuse. Symptoms may include pain in the lower back or legs, numbness or tingling in the legs, and difficulty standing up straight. Treatment options may include physical therapy, medications to reduce pain and inflammation, and surgery to stabilize the vertebrae.