Thankfully, modern varicose vein treatment and sclerotherapy cause minimal to no pain at all. The discomfort of swelling veins can also be eliminated through vein treatments, such as Endovenous Laser Ablation (EVLA) treatment or Endovenous Chemical Ablation (EVCA) treatment. In addition to feeling much better and eliminating many of the annoying symptoms of varicose veins and spider veins, vein treatment will also result in increased blood flow, better circulation, and reduced risk of a blood clot.