In use over 25 years, The Sacro Wedgy has helped thousands get relief from a variety of symptoms such as sciatica, low back pain, hip pain, knee pain and more. Relaxing on a regular basis helps the muscles slowly rebalance using gravity to do most of the work. It is not a quick fix--nothing is; however, addressing and helping to correct bad posture and "out of balance" muscle structure helps treat the origin of the problem rather than treat the symptom.