Hip pain often reported as buttock pain, right hip pain, left hip pain, hip joint pain and lower back pain radiating to hip and leg, is fairly common. Pain in the hip may occur due to various causes including hip arthritis, fracture, sprain, trochanteric bursitis (hip bursitis), sciatica, muscle strain, iliotibial band syndrome (IT band syndrome), avascular necrosis, Gaucher's disease and hematoma. The treatment for your pelvic or buttock pain will depend upon the specific hip pain cause.