Can I use a foam roller on my lower back?

Specialist subreddit consensus, including threads in r/xxfitness and r/scoliosis, is to avoid rolling directly on the lumbar spine and to focus instead on the glutes, hips, and thoracic (upper) back. Reviewers warn that the lower back lacks the bony protection of the rib cage and pressing a firm roller into it can worsen rather than relieve pain.