I have had severe leg pain in the back and some in the front of both legs. In my right leg I have what looks like phlebitis. I went to a vascular surgeon and he said it was not venous reflux and he had not idea what it was. It hurts a lot and it coincided with my sudden onset of severe burning legs that started last October. I wonder if they are connected. I also just started doing methylb12 shots and my symptoms seem to be worse now - is this normal? I hope someone responds as this is my third post and nobody has ever responded - I'm feeling quite despondent about all of this and I hope that the b12 will help me. I am a long time vegan with a history of taking zantac and tagamet for a long time. I also have hypothyroid (reverse t3).