About 3 months ago I noticed a pain in my knee, only when it is in a certain position- when I am squatting down on my heels (e.g. to look under a table). I also noticed that if I kneel down and make contact with the ground at a certain angle (just medial to my patella) I get a sharp pain that radiates up the back of my leg. The pain that comes when squatting is less severe.
I cannot be certain of the cause but at a guess I would say that I first started noticing it a week or so afterr I had a fall onto pavement whilst running (I was wearing knee-pads at the time, so it was more of an impact fall, rather than a wound).
More Info : the pain does not appear when I passively flex e.g. a quadriceps stretch.
I am 21, have a BMI less than 25, athletic, male. I have no history of joint pains or problems, nor does anyone in my family. I am a medical student and the pain is frustrating me because it will not go away and I do not know what it is. Any help would be very much appreciated.
Thank you in advance.