I have phlebitis, so my md says. 3 weeks ago he had a dopler on my leg done and it showed superficial clots in my varicose veins. The clots were on the side of my lower leg near my calf. It moved up along my knee. He told me to elevate and put heat on it. I went back in a week, but it had cleared up in that area and moved to the back of my knee and up the side of my calf. He said he didn't think it was anything to worry about, to just continue with the elevation and heat. It has been progressively getting more painful in the back of my calf, like it is in the muscle. I can't walk without it hurting. I went to a vein Dr. yesterday, but they can't do another ultrasound till next week. I am worried it may be in the main vein that is dangerous.