Butt pouting backward feeling back pain, may be lumbar muscle strain, lumbar intervertebral disc herniation, lumbar fasciitis and other causes. 1. Lumbar muscle strain: long-term stooping and weight-bearing labor, easily lead to cumulative damage to the lumbar muscles, so that the muscle tissue produces congestion, edema and other inflammatory reactions, which in turn affects the surrounding soft tissues and blood circulation, buttocks pouting will increase the inflammatory stimulus and pain. 2. Herniated lumbar intervertebral disc: prolonged sitting, prolonged standing, frequent bending and other factors may lead to lumbar intervertebral disc structure degeneration, osteophytes, which in turn oppresses the tissues around the intervertebral discs, blood vessels and nerve roots, and when the buttocks pout, it will enhance the compression of the nerve roots, thus causing the symptoms of lumbar pain. 3. Lumbar fasciitis: when the lumbar region catches cold or sports strain, it may lead to aseptic inflammation of the fascia, which in turn stimulates the surrounding muscles to pull and cause symptoms of low back pain. There are many reasons that lead to pouting buttocks backward feeling back pain, it is recommended to go to the hospital in time.