What Causes Recurrent Burning Sensation And Tightness In The Legs?

Hi! About one week and a half ago, I had my vascular surgeon do an exploratory on my deep veins to see if I had any blockage. I have had swelling feet and ankles for years. But, after he did the procedure (first in the groin area then back of the knees, he found no blockage. Unfortunately, I have been experiencing awful leg symptoms, such as a burning feeling, tightness, throbbing, etc. in my calf down to my ankles, now feet. I went back to him and they checked for blood clots - none, and I don t seem to have an infection. I took today some ibuprofen to see if it may help for inflammation and tonight the symptoms returned and I think I am getting the symptoms in the other leg as well. I cannot sleep - there is no position that does not disturb my legs. Please see if you can help me as I do not want to go to the emergency room if I can help it. Thank you, Lynne Albrecht