Hello , I have a recurring problem with my knee, it all started during a trekking trip 2 years back, it shows up very severly every time I stay in the same position seating or have a very hard day on my legs . When its severe I could not even stand once this problem arises. I tend to collapse the pain arises in the outer side of the knee, I went for a treatment with two orthopedicians they had some x-rays of my knee taken and said there seems to be no apparent problem visible and had provided me with some medicines but the problem still presists, Please advice