Age 27 years developing left knee pain since 2 years without any redness or swelling and if I sit cross legged e pain increases on walking and stair climb and I'm the person who has to sit continuously for like 12 hours becus of my work so I have sit on chair there is kind of lower limb weakness or pain type of thing if I sit down for somtyms my knee gets ache What could be the cause and any precautions or suggestions are appreciated Thanks in advance