Many people describe the pain as a tightness in their buttock accompanied by shock like pain down the back of their leg, some also experience numbness and paresthias (the same feeling you get when your arm or leg 'falls asleep'). Once a patient has been diagnosed with piriformis syndrome the next step is treatment. Manual therapies, including soft tissue work and stretching will effectively help treat the muscle and decrease the pain symptoms. Below are a few examples of piriformis stretches. If you are having buttock and leg pain it is best to consult your chiropractor or primary care physician before starting to treat the symptoms yourself as there are much more serious conditions that could be causing the same pain.
Wrap your hand around your leg that is not crossed and pull it towards yourself.
Hold for 7-10 seconds and repeat 2-3x.
You start on all fours, then cross one leg over the other.
Slide your non crossed leg back and then lean forward, supporting yourself on you elbows (as seen here) or rest your forehead on the floor.
Hold this pose for 45-60 seconds.
This is a much harder stretch to do and I suggest taking a few yoga classes before trying this one.