From last two weeks I am experiencing knee pain (upper side of knee) in my left foot. I am only 24 years old and has a laptop job of around 12 hrs. I tried itch for 2 days but it didn't help. I wanted to know why I am suffering this pain at this age? Can it be because of sitting whole day or deficiency of calcium or vit-d? Or there can be other reasons also? Please suggest remedies and what type of doctors should I consult to?