Hi Jim, I too had a similar issue with my leg's vein acquired during my second pregnancy. I could see a vein on the back side of the leg like a lump and it used to go more swollen many times. On a visit to the doctor, I was asked to undergo the leg vein treatment (sclerotherapy), the results were fantastic and there has been no reappearance. It just took around 2 weeks to heal completely. I had to wear a tension bandage for about 4 days. But I'm not sure about your issue. You say that you have gone for an ultra sound, well..I'd suggest you consult a doctor in the first place. And yeah.. I do think varicose veins can lead to phlebitis.