I'm 31 yrs old, 185 lbs, fair physical cond and yet my legs are very sore, swollen from the knees down, and at times sharp pain. Several trips to doctor haven't helped. Catscans, ultrasounds, and bloodtests turned up nothing. My doctor is stumped but I do not wish to have stumps for legs. Any ideas? It's been like this for the past 6 months or so.