Lower back pain is very common and can be caused by various factors. One of these is not usually the first suspected cause, but it occurs more often than you might think: constriction of the piriformis muscle.
This small, thin muscle lies behind the gluteus maximus and connects the spine to the upper part of the femur. If the piriformis muscle is tight, pulled, inflamed, or spasming, effective piriformis stretching can restore muscle function and relieve pain.
