The lower of ends of the treated veins (10-20cms close to the ankle) with Endovenous Trucal Ablation are very close to neighbouring nerves. Therefore E.V.T.A. should not be performed in those areas to avoid from nerve damages. On the other hand, if these parts of the diseased veins are left without any treatment, the preoperative symptoms of the patient may continue or the disease can show recurrence.