I am feeling a snapping sensation in my right knee, although it isn t very audible. I cannot seem to fully extend the knee when standing or walking, so I find that I am stressing my glutes and ankles more on that leg when I walk, which impedes my mobility. It isn t particularly painful unless I try to fully extend the right leg, as one does when standing or walking normally. I haven t suffered an injury that I am aware of, but I m 67 and have arthritis. Any thoughts?