This characteristic pain tends to be associated with:
- forced activities -- squatting, weight bearing activities, running.
- prolonged sitting – producing stiffness, pain, or both, relieved by straightening (extending) the knee.
- on getting up from sitting, the pain may be severe, then diminishes and even disappears as the individual keeps walking.
- the “theatre sign” in some - where the individual seeks to sit at the end of any row of chairs, to allow the relief afforded by knee extension and even standing up,
- problems with walking - where the person may exhibit weakness, giving way of the knee, and 'catching'.
- stair climbing producing pain when weight is applied on the leg, when going up or down stairs.
- snapping, popping, or crunching in the knee occuring with activity as simple as walking, that may be accompanied by pain, which may be so severe that the individual feels that the knee locks.
Patellofemoral pain syndrome