They call it a crush, but symptoms could be from impingements, adhesions or just sticky fascia.
If it tends to come and go somewhat it could be due to trigger points.
Triggerpoints and referred pain and stretching:
http://www.triggerpointbook.com/index.html
http://triggerpoints.net/_sgg/m1m1_1.htm
http://www.pressurepointer.com/pain_reference_chart.htm