Since last 4-5 months I am feeling pain in my left leg below knee on one place near main bone of leg. This pain goes mire whenever doing more with legs or walking fast. Someone is telling it may be happening due to blockage of vain or nurve because i am doing a siting job and not excercises daily. But whenever i started excercises pain goes high . The pain is more on just one place of leg near or below the bone.